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 0xf069321101c8ed78f72a2c17af2b4cef8e3ec94c9dcd9f0e037855d461526cdd. 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/6710f0a4-df8a-40c5-bdaa-9e59bed0ef04.json and https://artists.proofprofile.net/proofs/artist/6710f0a4-df8a-40c5-bdaa-9e59bed0ef04.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 0xbef3f63d5cdfa1b04fa751984bf91aed39999c5fc09c169f3439bf235b401e54. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USX9P1019315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1ce3cad128bcc3be2f8a320d9dbc9f9da167fd5d4e2d9c93100dc4217d55a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USX9P1019320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca84f64fe47081398802129fb912fd088e31134785ddd18dc581125eab843da. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USX9P1019271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e4685cb89aee02b8ed9b0710923f695419760c977d0052afca1409a303a57. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USX9P1019273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1364ee466b5e71d2411dccb1dc56c0c6bbdd5a0b1462118004b46c0104996f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USX9P1019274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08f09e438bff9efdfd1b07fc6ab0f2691f5b3e569685824f2d57e3ac3d75a5. 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/USX9P1019275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff3ca7d9283436d44be9584754f983bb5436b7f3796e035303a90f6f52e4478. 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/USX9P1019278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4294e331e0eee1d9d4131fb474bd3bfc60d09d7e84cce49826a2e9c5989f2. 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/USX9P1013860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d3559a48cb934ed4147211ec03149991174db1dcce746416102d1b1c24e0e8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USX9P1019295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9b9bd3fd5ddda77dc4e9c895b4eb12dc8f15107ef29093a152f4f85f51790. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USX9P1019298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397828e69c1625843ad2c25b0d1c960dd1cbd7f5ca03f2d1f204d0680a49dec9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USX9P1019299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c964f320cc724ce6f0f34c92c1f1b766d502645d558d902675bf27714109d1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USX9P1019303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb7b1f86546e615e40af6d8eb72a7978918d23292006cff6e1ccc8f224e79a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USX9P1019306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078dcfbc399500f533e79ca8016636a92452a791d2a3db496f880141a153c4c2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM81141843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c0e553f830fd52feb33b43351f9c4d2363199b3f63576a76e8fe340816f55. 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/USHM81141847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0604f72410ed6c840015c90a3e2ed19e108835eb0bdd624c068d1c6129d9bf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM81141848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6c0f0259c8c1ce8dd5bbcecd25ddbe1db12fd0669f2d0e0399968bedeb90c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USHM81141849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d0c4a9ca3669421ccd64d19f773853913a5b69dcf88b1272c954a3fd314b66. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81141850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20511615da4971d2089891fdf92ebe860b4df96418a6be722ff722097d140f. 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/USHM81141853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff736aebfd4a019a4346c4fab6ef6ed83ad50e6f71fb793d23e501b37f2c0d54. 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/USHM81141854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48342f783d5d1b0742f7f7175918d7a79ca7559b32972600c6f6357847d1d57c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USHM81141839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38537fcba43ff482cae51f84bd0e677e23da2f252df35116889415d61b612ecc. 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/USCGH1602409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02644bea8a8d7d65e3bc5aa80bd686cfb6dc1b339e07d429839d39a87d280f7a. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGH1602414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3b405026473eb2c1befcb5d0cef6db8d494245a44a90f033088dd9eff7ca4f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGH1602416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4cdfd848cdee7dc1381a910a256bd318fe4e90538612dcb1d81414f1379ac7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USCGH1602418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791135b0e787010215889c81553d326c3d6721503f52e1df0868a6628197ea50. 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/USDY42184571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15116780b36005758a80222b98bed83aad1a19c3a1791d1be2968937d6be7a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USL4Q2120266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb93e39706ad1033857c38a4b2820e7e2a4e59b6fa70c145aa6858246730a88. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGJ2210500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0cf3e5c8dfdaa2178c14bac40f27c2419e46c256270ca408017ebbd1c096c9. 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/COA2N2200101.