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 0xd3ffd602848c80f3b8ea87ca5e38f04a638c515d9b3a11ef7904d7347674618b. 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/76bcc1c0-68fc-4c27-91d5-39df2873ec0c.json and https://artists.proofprofile.net/proofs/artist/76bcc1c0-68fc-4c27-91d5-39df2873ec0c.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 0x33ce6275f68863f27d481befd272980d07cce64792346f7b06afd4eaca9b606b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBRKQ2269434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa54d7a79e9e11b2e4b95ba5317fb7b181c5dfeb9b0307059c5b573f7c23f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHM2247762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e180fc18f4e16b548b2a36cb6fd570e7122a77619f2fc1983a0e6d0dba9d004. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZWDD2257666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce6e862729f3835a58a0ef294ce7561411fdaa1bcfecf396f72d62aebd2cc2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWDD2257664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79ebd291c7ea8ef3b44cba1b72cae3e0d76c8a8bb325dda0d96a13872afdd1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZS7J2367700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446494b11a982dfb12b87ffe870ed63cacadb2cd17a9465cbf5f86058c491751. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBRKQ2313574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206b7b3d1beade34196df36f953cfdff815bb511c43be1b18c9a7755b7322dd3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTL92338109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f672faedee185ee3ff220f59f04ae5e633acc8d0191116ea93153450c05fb1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS7J2332360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4b0a0f3ca1a34e00a4e2d0bcc807b34b19240d0dae9e6288c8477670fd598e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTB22396100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d4bfec749dc35af2de36dd16ac4aa132f386b74caa97d2a341ffd86e41641e. 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/QZTB42329218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e299e7460e898df5ee627c1aab7745c215a926b839f3496870be2987d38f12. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBRKQ2497052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217caa73ca7185ccf903fb861587bed826f621fdf71092932526c01c82447d1e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA42489111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141b4d1bccb176a2f57fd2717d4ee0ec9a033ffdc279c4159f3253f3a4d32e7. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GBRKQ2497253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4b0a0f3ca1a34e00a4e2d0bcc807b34b19240d0dae9e6288c8477670fd598e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB22396100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda004651c765fd1c14ea9098e97ad101add0b0598d244fc69f8d52a7c03ae5b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAQOI2306420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3dbf5820562997714cc1287f7d35782a5066698359ccb4d679d9b8118578ae. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTV32446473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eaa174de142970c6a31afb1d0de921f4f933223d3920a6366f9108f3f5214b. 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/QZWV32420629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff99526450b0338d649a1609afc8a9816ddc83879b04e70e2cd08233ddf4486c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBKQU2482151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbdaf85d349b37fe038d54c2be4a81259f77b7ac556ad25c42932c4cd7e75d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ8A2424158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e782c51b25c58b20dee53fefaa162fce685232259faee49f0f11472955685ee. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBKQU2525162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b49b2f54f234c0606400c3a61080c1898bf7acf358d261d1fa1bb90cd00678b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2525163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26362b42e56d6c0e227b5be85845cc1b4eeb667195973c3c908f9bb99127d44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWDD2515771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56099796ae11ee4ebaa0cd5aad7f60cb6f0b4fdc0db1aae22e7581e8eef50c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWDD2515775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc0c6be646bec7c9d60bb521b214059a7bd39f0959be01b820792e2a1d475a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBWUL2597670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b5be90366b1217f9dcef2a3c6b94a71b64b8749d89486947787e074b3f919a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ8B2454640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd57f408d3363d3055ac2176bd473b9c0d3b30642952499d7c4869a85c222266. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZWV32546784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acb7cc32caf3ebf08e4d36934b13f125af61a58bc6f262cb338117068be4e7f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWV32546786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f6e754eb22c136f9f9b6ab4fb8630ceb1762478f97f4da63b84bb9734940b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ8A2438153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd2ad6ed9495796765ede7e82f41d13c6cd2f96eaa2fb5cb1665fe978a88335. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTV32572168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eaa174de142970c6a31afb1d0de921f4f933223d3920a6366f9108f3f5214b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32420629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a9ba1f2773bb49d90b2bd4e49a6315734bc9ccc7b901abd8c565cda85c8cdd. 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/QZ5FN2521392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fc9f1f86d4b0bb2ba7cd84e1a38ae3f6e23f2bc46389fd640a0e8a7cc8916f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWDE2556052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec20e1e5aac745f6ea55194baddad055ec6e2711d8a8cfcab551648216ad652f. 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/GBWUL2270790.