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 0x73279a38624a8bb035a91bdf405fbb104d6155c083676cbc8182d08555a3d88c. 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/6c337a84-8c71-4f26-8d2e-37e1e847516a.json and https://artists.proofprofile.net/proofs/artist/6c337a84-8c71-4f26-8d2e-37e1e847516a.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 0xc274baf0142d2cb7ef7342affad20d97deee8bd6de2df7eba514914022ca0bdd. 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/QZNJY2011988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1651cbfff334f9503b4b663611b0d381782013bb7fddd75eced01553578b55. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNJY2011990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34127e9243ce0b09e157941671f95f9ef5e95d1a637756c30cbef4a59440d246. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNJY2011991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926723ee8310f1c48ae3163af610b045b0e404cdd0e14dddc47e4c8180ea5115. 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/QZNJY2011993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f36226d3c67bde9620d4986b330fb24d637f92d73c4ec43c835de04b00099c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNJY2011995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e8c9994a63c6f6e16692c0e70fad1592c431bb070fa59660b91558242acdbe. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNJY2011873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ae63cb4edf6ba293874793a9fd945deb41c8370b449d744118fc747382a49. 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/QZNJY2011874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5264146448a98f2a1d3fca13480444ca94486c669c29b800d170ea8eb9a08463. 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/QZNJY2011875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3792ad84039410501e0bab813c81edef771afe853609f8270822a3bb48f375a. 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/QZNJY2011876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac46e3c3193ade122dcdf805e33d426f30c83e9e98895486679392d2df6597. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNJY2011877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c311ff0f33b29db310e421e2e1c3b90e2df1b78572564ba0e09ee1a7d27e5be. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:54:02Z), 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/QZNJY2011878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ee05675a997da7dc108bfe541a2cdfa94c619cf069ca933e65fc89f87a2f4. 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/QZNJY2011879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33f7d1bd8b89cdfa9b41be04625c1dac4e0b87a45f56b19b508511d784ece0f. 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/QZNJY2011880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ab533564a1f0b33e57ccf816ac316e2f526a17fc45c8dc68c9fe2016c2cbdb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2011881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5301194ffd703e7ef940bc4d76f517466521c60dd95a9ecc1c461407796cad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:23Z), 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/QZNJY2011882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe77cc83137e5255309950f4ba464eac333ed3cb190e157c00bd4f3d0cc192dc. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNJY2011883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac0d60b90c60a6ae1e0efcc31534ced29a5a6c2e69adec9a17e8e15078be73. 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/QZ5AB2166748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd026894894d1389878672e8aedec38feeac1e23fd4ac99d8e19f6a21c929e366. 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/QZ5AB2166752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883749a5031047164f29473a396794cb98397f2bb5c325504e3966cc99b5974. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5AB2166754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357393895c0843569d07582540e87d9222cbd403d11f8addacce8ba7d0419c2. 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/QZ5AB2166755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7502a04731d79df56d03f42558cd59efd4dccbe9f1eae7a65384da21de0746. 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/QZMZ92166564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae230b64a7a54eb7d667599d5aae459f45bd9a007080ebf72783abc1528922e. 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/QZMZ92166568.