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 0x2c57e5099dcb44504495918b55abf75272b72b5786320a41346f015bbc185208. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cfb0357-ad86-476e-a6eb-4438c8a0efd6.json and https://artists.proofprofile.net/proofs/artist/8cfb0357-ad86-476e-a6eb-4438c8a0efd6.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 0x2c3fb89c5715ca81cd5543bc6310060b8c2920104cf30b830ece30dfb1c599b6. 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/AEA0D1901504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4540a6547a6af7a662ff909b7d0fbfa00ab07e21171131ecbb5d9819c878f820. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/AEA0D1901505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e98e3ec80e99e817d20d999adb6ad88f4898164e1c62e8ee1f9f8945103b33b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:47Z), 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/AEA0D1901506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477c50a02272c713c54f09f91d44291b35b520747002446aab2473489c414fd. 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/AEA0D1901509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2c77aeb16f4f7f0acec93aae58ef8332f36cdffc833228dba97778324c4a4e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AEA0D1901510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4452379f664644c3eb1bd39a7ddec6288cb7cb3dcdb787bd3fca1416c7ddad1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/RUA1H2086918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0262e08cb415c8b5a06da743b35ef42ea1295382dbf091180ebf60d744b4d347. 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/AEA2W2360137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07240945b46401927d8c5d76e608e45a9c6ff0bd280479a8f764ab88f9e222e. 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/AEA2M2376147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771032c1067bb38f4aaf4d8f8174c932fe58ebc1644134caa61e71f0a3f2a360. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AEA2W2470503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d508fbf494dab8cb05951ce6328d5e5e7bbfa74855f2cd24a02b52359bfd06. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:02Z), 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/AEA2W2530068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef66c4959ef9e76f76458b0920e95e2cc817f14755dbf350ac4c2c823096daf. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:55:46Z), 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/AEA2W2544692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e52ecc64ccfe2d6a0af38b81371869575541fa20244e773a18ff0e43407fff. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/AEA2W2599887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd134ad3d9c7ea866c28262446ef627d1404d9b544bdbdd03443015a1df133b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:44Z), 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/AEA2M2548704.