1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ffe42de7ef8cfff7ab2177182a7980bef7c1d05740e465980f22051fe2d32. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46fe2ef2-63b9-4c34-95fb-ebd450048af2.json and https://artists.proofprofile.net/proofs/artist/46fe2ef2-63b9-4c34-95fb-ebd450048af2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec96ce99e4255215eaeae95300a4e2b5b10d880336aa215b5e4f1fc0b44cdb7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18af5950764b966181be10cb34804d2cb604c5c772afccaf8ad79188c854d96. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0602305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19415eb8bffd7e5b473dbac4510869d7c071adf678578e043842da5250b4ae. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2512c551f52b69a5af234b5ab8decf6f9d6ef57f0f1bcc3da6d932d55d8f22f4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f94006fa9958387ab802f66316a0ec843cd8f14d8f6aea7a636d83b157a32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0602304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944a72c13325e3eabb23e76b7c8431c96880cdf6f1312adc5e1a8a368cdf2195. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6b91920fcb8dd53964fc8d0b3c2f53f29eb7f1f76cdfba3916b7e02ed502b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28748f972d65929a4caf01a56d254ede7052be3ebb913042a376ef12d1afe2ac. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff547d9e473124d9db6852b97108ac72e78a07048218b40de8f1424c5658a65. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0602303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdfcd7a89906da18b04a56d4ddbb4d8a7ebac8777f514424bed413e3692e585. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ab137434e2c3be109475e418d9d13debc6f9176018553a0643c629c0c242c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b8f24d646dd5709d9eb24018994e91c82b93c8b152df6bc45a6d28200d353. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf683d68a1b9c579259c1a9a562c54616453fca967917a0e5b0f569c6680a4da. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0602309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee08c41a1820401c2b21a4bd8f6cf4f149e165f4b113c05c1c636dc5a6e1f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88abab3350eff1e7c9a0acf059e724cf12fde45f2ebbb0339b453301dda7d5d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57a2d0a634c4fc80b1c1ad54218ffff2b9b09762bfc05a74005a96fddf00b52. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c669f162f522da5f95f33866adbd14561d4b87aedb8dec2292a9fa9756543b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0602307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7e1453b2c5ae14c7a2cf267de7d7e9ae87c9ad8c61f0672ecb655e11ba9d1c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bf62569f9f1849edf53562c2f2e8f80a58e8112a782079172c5a8cd346dd32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6b91920fcb8dd53964fc8d0b3c2f53f29eb7f1f76cdfba3916b7e02ed502b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec96ce99e4255215eaeae95300a4e2b5b10d880336aa215b5e4f1fc0b44cdb7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8b0ca060673efd8bd4ba7c112534daa1d7e1a87ab96a9973d5fb184c1d913. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ab137434e2c3be109475e418d9d13debc6f9176018553a0643c629c0c242c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88abab3350eff1e7c9a0acf059e724cf12fde45f2ebbb0339b453301dda7d5d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838453f3177e631d3a3373ff0864fad2532d1954baa68154d6f189b61ed3246d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b34bd6a95f8b1f42c8dd087f52e63a8bbc471ff90dae3ab016ba76ddbc0b99. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e243af81c90847405e4d12028a9892908c3e0061c63c0ded83ccb6887e35bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487088048eb893477254cb019e1ad8bfc6f0ee28fc91f59526eb952b1da4e9d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6095c9168982c2ce5017491393b107329b5ea7f92a10ca45b6ed98cec6ae837. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a3ad4ff921229b7dda59e0ce50583725dc824a34cab8de0702b69240ed91d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbdfc2b830605a1f19da850a1ad8a39665c780f2f31860f7ee7741c5bfdc369. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19415eb8bffd7e5b473dbac4510869d7c071adf678578e043842da5250b4ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28748f972d65929a4caf01a56d254ede7052be3ebb913042a376ef12d1afe2ac. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393935c0681385e179fd5d790741bf86a20b9f928100b1dedb4ca6f2e65b8801. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb639e64ecc325cd624479493f6406875b09b4885cbe18f80484067723a0317. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b8f24d646dd5709d9eb24018994e91c82b93c8b152df6bc45a6d28200d353. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6a338db9688718fa32cd181c27d342942b1dcbc0946dfa657814fe72048b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffff44106787ef66452ba92764ac469c04fac3a705d4a080c07e9284d79cd84. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57a2d0a634c4fc80b1c1ad54218ffff2b9b09762bfc05a74005a96fddf00b52. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665c5085df59d822e522696e4dba2e9e9854850eec3f54bfa620594eac97182. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4d7b5c688b06e15a0f251919772baa91159d0a2f33139d8fb044c05868049. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG0800367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9522421c28ad6ebeb9873bd7072fb2c097d8aeaeb40d6d64c0eb86dcc94fbd36. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1100442.