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 0xedbb2e2e21ad8c8c25753ba285251b1f5bde29966858b3f40a26d245ca0873b7. 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/54107ba4-d45d-4fdb-abdb-b92cd70ea80e.json and https://artists.proofprofile.net/proofs/artist/54107ba4-d45d-4fdb-abdb-b92cd70ea80e.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 0xdf6e5c3d2deefa877ef13d3b7b3cbe70f2fa330190c99046bbd0bfef36851297. 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/QZNWQ2258680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3c1012ac3d127381370760431d46301a4b90809ebed8c8dcbc005546ca11a5. 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/QZNWQ2258681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b06a78214f1dda97071c6b40969e2eb803ff3f87d871e1468aba8efd31c5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2258682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc30a37a4648cc236a7d616befb3a110d715af74bff9793bea0cf07c35df4c3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWQ2258685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5242daf02335bdc70538cbddb01458c813befc94b516e38ea4d7c74fe09ee62c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWQ2258688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c3363e0e11912932abb3534e152aa0806bb0ba2ac1cc93d288578fe1a9a91. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZNWQ2258689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e849964c92ec253cc324277d8e5c21b1fd7b05ed81bb78ca47617a18382fb3d. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZNWQ2258690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c31205ab0f6921f54aff4415dc61514519a7d0b3ec1c0a9cb9b28f20db5ce7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWQ2258691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe851ee3c1109c4c64323b8c0ead570ec2a154ce43bc574d90ef4c02efbdec. 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/QZNWY2122265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d84b88b4103bff5aa4c30f2ea86205f90e0d7afccf750834d0b7e2b89c30f7. 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/QZNWZ2113993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0c4d2a3ef5442ead39922d17309239bf56f37f36ec4d55fa7e5e277432fb04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWZ2113994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5ecb6986836dfc9c19f926a64d08c147829dc8aa033f44b3d0ec00f66c314. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWY2122266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f8f184113f782e8a40436f52112b759bb3246ad89e656b576f03f261606822. 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/QZNWZ2113995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4b0934c50dfd9828dd726982514eb2ca0e8b21c7ccfc4205bcc44720c3c8e. 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/QZNWZ2113997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155edf46e3a0a05105a9789b87fbe4b2e16e107b0d6ca43d5d7556e306ff0d3d. 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/QZNWZ2113998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43de53066d14900ac6a667154c95be6140a966bb01b2c23de693207519798ec9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWZ2114000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56821f4492373f64ea3ff0ac52c3fad2b0aae1e97c2d63a6cd7fc0c0690a5eb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWZ2114001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b24523009968518ff9466f775020d4c408ab2dd040fb95dee25d116cfb27a5. 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/GX8LE2441448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e4456df5b4b6b4e8f2e80f3ef14365e543507fdd11b24e992d3f6c7e9b0d3. 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/GX8LE2474310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90182277faf28800a58a7207f077687ff2ac9de5da13949963cb02b920920e63. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2479629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f140e2f4bd96135d91cde4b6c3d91f78ae7c1fd56893a5d822e2e3c9cbc616. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2436753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8bbee8a2b6a64c7a8d35bd1fcc8c6fdc00933502c8684049f91d8905934147. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES52338934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc6a44e382f47153a1bac6d233e26cc6fd836dc57d01626e222a6c58add3b4. 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/QZES52338936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933fb4cfa17e776b0aa245ed9301d8983c6532ffefcb0d5d443310c661d2cf92. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZES52338937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63080095e677e88b534fad7fe1d0f6d037405eaee53aec8273c5d18db6213037. 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/QZES52338938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe851ee3c1109c4c64323b8c0ead570ec2a154ce43bc574d90ef4c02efbdec. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWY2122265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5ecb6986836dfc9c19f926a64d08c147829dc8aa033f44b3d0ec00f66c314. 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/QZNWY2122266.