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 0xb40f83abb0cb271b0fe7530cdf3aac4125abf364d5444997fc087f077565199b. 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/ac36dedc-fe87-4d16-991f-616e2183d50f.json and https://artists.proofprofile.net/proofs/artist/ac36dedc-fe87-4d16-991f-616e2183d50f.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 0x3989637d9591ebf3a8af8a5ccc98fc901b64659215a2f311722379e45ed52058. 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/QZFZ22367238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fcf4962ee73105942812b2b40dc1942b0335cc46ade635783ab9d14653e143. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:25:19Z), 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/QZFZ22367239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777cfef2837592780e8e66dff28741cc3f7ba28d5f4f05472eb0d0e2e0451ae6. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR26V1553923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2e487e2590a0eed2047165aafe37483b0252342cf304db1fd73e48345d3103. 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/FR26V1553924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1aa35bb5603c04963e0768420772169bfe5bc6df5f2fa0cd1a8e7bf979d6ec. 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/TCACD1509301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf611fabb717e77f22ee194268a0e4a99acea247c1853cca480190ad4221bf772. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCACD1509302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b1ffda2c5bfd30c4d028013c0847021bef07564dc3201e3a626f14e93080c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCACD1509303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae61babb52e4c98e6d317e4f6f2d1f90cf2ab09cf5ff53990ce8f8a93e99bb. 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/TCACD1509307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf55970de9e8bb16e06cf8920571ff605d925c606d46b273d7dbfc5528dd9f0. 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/USCGH2129785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340594ecbce0a362ed5b5140310b28c10077a92bb3f81d8bbbd8c22d2b180ad3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:29Z), 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/USCGH2129787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c700d073a62351b2e7412a8f075c1baa1db10cc461814ecabad8a906ccbbfaf. 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/USCGH2129788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef3550adab9a9a7d93949bb1209d114902118277b5794db3c74dc9cb25f854. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH2129790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b896542ea81d80398a0f21ce70b4d2bbb7290c1fd5242b3eccccf3e6fa3556. 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/USCGH2129791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6921e5541cba6d270c2046888ceb4b0cbaff07f835295d267e6431d1b49cf3e4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH2129792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ab4b5cfda135eae2edef16b8f3ca8882ca2ee8b47eeb03506e522c88537a69. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGH2129794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a497e2f5262b4947f77b781b7b7b9c8644caf376570407a56b810ee4bf3adb7. 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/USCGH2129795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292730d0efab5ad4f8b1ad3bb5b780c6b1266d0010c2a732fdbf4565c4ae6ec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH2129805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464fe90d2c64b45297b73e9e68716eef1ca86d8dd038328efcf951ecc6541ff. 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/CH6542160361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99682c799a51aac14fcdc99f749b935ae92dd0c9ca420febd9a482f5ac781687. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZTAZ2243952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe5d3eb919923f7fbbdc4bcce42885f917f7728a6a48ad6cf8cbf081c21f6a9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAZ2243956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a345d5917cd9e6bf933ed034e52787c5867eab60758e9c9f7a72911551194a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:38Z), 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/QZTAZ2243958.