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 0x4dd29663bf4aefbfd8057dd229aee0704cc20164dc2cf96020e353e15d430701. 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/ed7123e0-979d-43c4-b3f7-d6f4bd6361ab.json and https://artists.proofprofile.net/proofs/artist/ed7123e0-979d-43c4-b3f7-d6f4bd6361ab.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 0x94075cbaa33c7318f1b238f1232fc77bf7f5d4a5577a20e87219a8c480323199. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:52:55Z), 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/TCAGT2310739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52900e82d742028aae7817b6a919bea3b56ce60647e87a13c79eb640476b90. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:50Z), 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/TCAGT2310754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1fb2ef4e1fd5d495d3d65b65d6a3b5287ff535cbbfacc83acae832bf6b35a5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:06:13Z), 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/TCAGT2310756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41eb3e8d18e981076f5691d0f2c7bfd579a1de9d54bb37ab3beefa97ec5c00d. 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/TCAGT2310761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9ffb5c057a8c4bd54d8fc7b9fd1fd0d4111c7cb31ac33192a3de35bbd953fa. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAGT2310762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a078298de45c11f8cc5788fb18bc85bc33de9b9c8f91c59d36f5f7cfc7b52. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:45Z), 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/TCAGT2310934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ed13cca9b703352a57aaee50d5dc3a0f9c2e6a89b5f443c74b90fb9fb74ada. 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/TCAGT2310945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f7866f953ebb163ad558fb4655df3d7f02fd90e369514e198903b34f17dffe. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:18Z), 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/TCAGT2310949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50af0afb6321008b166b4321f66d3dac52a7d623299a95f723543bd8d76e23. 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/TCAGT2310627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a337973dd958b4acbb734a347630b1f827076012050360ecd299ab27cdf0e4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAGT2310639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be840cd1c352e68dde6f7c32761451153009a99665e84e7c72da9db1857b632. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:33Z), 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/TCAGT2310648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697c8a5521328f9b658b80c9889a3be4ebdd2499d52531163e88f3a3ee7a9d6. 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/TCAGT2310660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc97986317eb487e94937f5be4b180938f0ee6e585fa39d0549526c724def818. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAGT2310668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000cdafa869769d94c6d8cf0d1da26d1b78cc1965a21ffe38d0aa2a67eb8daa7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAGT2310673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5118528d3c2e1c11d4f951d114ce357a631663e042c4d8c0bce785031c34f4dd. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:36Z), 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/TCAGT2310700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e60a84c5396896aa4c5d0b2b5c0541096b80a14624035951cc36e39c59c78d. 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/TCAHQ2349024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9af2307d8087a10dbccda384333c6aad27dd299ada6e35144917f3c15b8359. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:32:19Z), 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/TCAIS2469825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e207abbdd1b93aa7203a1fa475032d95eca68d0665c59002c5a68843982ba. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIT2469832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda19bdbe2b12ad865ef3f939d53ba3bd47a3817fc409fe12f48ab05a13f0ad10. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAIS2469835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c9b24913f343c15fcb7950f7bbf668f04a4ebae1b24619148cf17ec6418721. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:31Z), 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/TCAIS2469838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11486aa6263481c94918541df30c89cc5232cb28194bca1aa01eb49eb9b7dd7. 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/TCAIS2469844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd580ca6d79c72edd324f963e2d54761a68a987d7d97ef9c24e119aa0b63ab. 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/TCAIS2469851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b096785d510e2fdde1bb7ef3736fc87ba57c45f7549d8fae596d66397b313fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIT2469859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993298a24f4b03d03778a4d5eaa244aca7299a851f0144eba8090605435e9fb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:04Z), 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/TCAIT2469866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53487b5d0a82af24fb4e1eb9b2d315123469d23e02f70ae604e88ee6aeaa2406. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIT2469871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2253c94165c685d7ec703b87d1a08889ebc52f14d018ed58ee2d26f3bf893f87. 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/TCAIS2469883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da4b22e44ce05382787f7544359406d7c14ef332be2e2b9c741803c82dbaeb. 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/TCAIS2469895.