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 0xa70be7e3e9b13293c7ce617755051b8d6e99223e9f363e0eebcf1d84c11b303b. 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/87aa0933-9b37-484f-b5e5-060af40aada4.json and https://artists.proofprofile.net/proofs/artist/87aa0933-9b37-484f-b5e5-060af40aada4.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 0x13c8a9232610623195076b199d79bdc785502f2cb845618b1872a0fff8eba382. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR96X1910317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc44a94bc1ab2b24f5358fe58ff26114f1cad2a5cc334867a6c9b57d4b3b914. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/IL1012300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4c82d1a549f1c4df55efecf83f66017d725fa18bef142e3c3e4319f380967. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/IL1012300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b2b5622fd6d8eafa633b4e038268198ba2507b3a529ae0363aea5e073a66a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:59:32Z), 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/IL1012300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a96d6e8ce4d2ca4994e180fa91c7121cfe5b11c97dff1a60edef056c24e5adc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IL1012300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1c17a03b3077c1a80d44face5148ef0a6f1d0512eea1ad03ea2507302c461. 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/IL1012301091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234bd224ccccb781f5e6ce9fb58025403d9945923989c45dfcaa57620af1cc1. 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/IL1012301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c91366425c2f726847229c58b8c48817ef22b643d62875a747faa000e857a18. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL7191900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc814d1ba2aa49670859c8dfe815ec461ed171e7a3c77329d16254a386e01c14. 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/IL7192000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17164505968f730ef828e2b8d4804c86e28e4547b07f84e2ad8f12a7b010a95a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL7192100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7de26fcda4598524c7a1d76e78cd0e9e94d5a4f0e304d8d6afb51d8ce70d5. 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/IL7192100377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc44a94bc1ab2b24f5358fe58ff26114f1cad2a5cc334867a6c9b57d4b3b914. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:56:56Z), 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/IL1012300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234bd224ccccb781f5e6ce9fb58025403d9945923989c45dfcaa57620af1cc1. 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/IL1012301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b4669d559d16542b3869db9a37cfda6948bf106ecaadadb7d4e01f6794fa6d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:35Z), 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/IL1012400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05601e4b527b049eef9dd79e576e4c06937b7ff8b74a4e1d92ab9f505b6cd384. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IL1012400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4545ff8251ad06b3970b725a8e80d2aca46e0614b41e6d0aa122c7b9adc3ed59. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL1012402049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b668e23ef66f4b10e188e5e42faaa4b62e19c42218f9ee6c758ea449517d1. 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/IL1012502527.