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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9038ab78a3024aa5d54bb34e6b3d8574115045812b1edb7199d1bab2d48595. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df0e6e05-66f4-4954-85b1-f9cb03398fd7.json and https://artists.proofprofile.net/proofs/artist/df0e6e05-66f4-4954-85b1-f9cb03398fd7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd788d60892a799a64f6fcf2c54faffda4ad618cce44d6c5deadadb51da77c352. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM42K1798973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214df15c6ed9384224634d08d2157b5dba99adf6141bfd15037ab9c4c6123275. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM42K1840032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e94d9ccb8ca94ec179a82ec8c542bf9ab1db9c664d9aebfc78a301de7928a13. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM42K1871276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914fc3b1ba8f18665fbd3a145fb4fbe0faa91f22c2c0f02c2b9660df872a7f39. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAKB1910009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09449021ed0e204e9a8bf4045ccf6234777b3aca6e9393b8128059de49f95a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN51948880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98148cb98556b8188fd1480dc52e839a0ec0b13a4fa5f16897ba35b308301a6e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM42K1989754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b475ec7b08315d03be7b983ef426468d0abc759878aa874d81f96166e3365d7. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:47Z), 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/QM42K2048750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2366a1578bed9031b41bcc3a919a3f0bc28bb6eb2249fc17d4e0a80621c20. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEW2081448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66a2f31e54c43e56123195c153f638403fa0829a03a138b693520f1af4b4ac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEU2057412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7769ecc8a4c3c1e967633a2d357c694367e60a9cfb3f386f6a7f80989581281. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:54:33Z), 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/QZFYY2107910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d6f8ee558d9a83f401b5a9b968a519c8bd122e2e8a9ae79c3c1e0677fd30b9. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMER2189333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce72b1e3b8a88812508528746d2d8807b47f9cc2a87957cb39c0a9403b42cef. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZHN72375443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be1b3a938770021b21d5e183e84ae8ebb876849f7affc598f8d1ee7988f286. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6H2327798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c1ed1b6aced698f9b9e5e6d94a09f8dc0ca8d99897d5dcfeea4837ac9c56a1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMER2393209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be1b3a938770021b21d5e183e84ae8ebb876849f7affc598f8d1ee7988f286. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6H2327798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf89e2a6f78829d69cd021bdc99edb837e4e56d35c3b8b62728a9ab36cb74d02. 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/QZPLS2392803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ef3a81dd715c05a5643225c87cccd294f07839fd09b7949b041aa1d26dd28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2392804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475718a947b97070d35b513e4972efad436d89fe28b2a159355e2d035f6c2ab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPEW2449111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1667a6f74574dfc587c5ad8436e108bcd25449bd56b2ce2a60b2a87a0fed6d2a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:08Z), 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/QZZ762577126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b60ba4cc8dca07a015acc5ccae404180ecbb9304f4ddbe6579947cb5b371d3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7L2593043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4adb016b0badc82d5d049f66d7dd650624644f273e82dfb0274524eab878f5. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ7P2505522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b8f0007ea0c3cf5d1647b2a5449f6d55d14d7457b3318fd061d2620a9f8537. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7P2505523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f54252edc69324958ba15d4054bc5a802926094efa89e9e95464c67209ba6e9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ7P2505524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa570cf69083b493a5e39078a68cf8fbcf47289b8cb075213dcf65697c5b0fa1c. 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/QZFYW2164673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82441e743b01339c6f5127354ccbd14492ab7df51fb0a72bd6727828f2b65c49. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWQ2470752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782831f1ac1b65d8eaeba9cc255e373a0b6114964945d69f2aa5503db6f6eb8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:08Z), 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/QZFZ62107950.
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 0x35b41279beb8db9c78d2d51bc6248973eaff3d854f027049d725c9b5589c67b4. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZMEN2434628.