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 0x9eb68a0b33a8373518138710aaaa08a8b5a11e234e8b89ce4f39038cbe6620b9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ce4310-8a20-4e0a-9d21-19f992dc87de.json and https://artists.proofprofile.net/proofs/artist/d1ce4310-8a20-4e0a-9d21-19f992dc87de.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 0x11d63fa37381f0c9cfde0eeed809ac91b620d086f149b66733e92e1d25ad1202. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:51Z), 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/QZFYX2049115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204da946cd78245409e0abade2e0e1d02eb1c1eb85e15f58498d5bed4bed7590. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:25:07Z), 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/QZFYX2049116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395730be6eac37f7f6181066015ec92ed2fffb5fc166f930a425184e44080e7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:35:06Z), 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/QZFYX2049117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9356d9c890e3c22fe790efbcefd5e179f89169bac45fff79f268b81bdbb373a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:04:16Z), 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/QZFYW2093969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4154a591edfcf52b1942d15b7bcc3d74aa103172b2a664635419abc1ae55624. 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/QZFYW2093970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a3ea55ae2f82a537ef2cc5261a8e59ccb93efa555aaaa56d39961c1c2204c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZFYW2093971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50b75729d68d6c80b034d839f19c043a029acd01ad25771f3d59329026a0919. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFYW2093972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4303e61dd6b7e51046b35332fa023ff78e3b6bbafd257e058d2b275605411. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFYW2093952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fa07b9c0dd3b8320902f5a68829934242eb1469eef8b06f1f14403a2bc8a92. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZFYW2093953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb270d384104b6cf8f678139bc6f3bd21db0107a30fc85f3447242d1b214bee1c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:34Z), 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/QZFYW2093954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8366336c0d2b649efa83ee9d4e6449717f6829dd33d49893ac49b62ef1b8f. 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/QZFYW2093956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac2e90878e81d8dfbe1d8224c160b93ca581891f3060818f17641708e4b3b3. 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/QZFYW2093958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e1a27d3af01186250beccbf126b36ec4ca5b69cf8c63a0d241822799e3b0ad. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:41:06Z), 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/QZFYW2093959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f9652660a20075b5c5b6450cf687239d4ad02161e2b9316361c500a3de025c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFYW2093960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0752adf329d3735c845663f14f97836353cc0cd4e54a3cf73d3712fc57b456. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNB2009001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0216cc40dd40290434d7edfbac6e87e14d99b637e4a9274a3a101af2ea83e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNB2009002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa299a000ce4b513c4f81638fb6f337debed4949df110785a833deecf7c98fbca. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNB2009003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41325420b2966f69e8babcd4d7aa3cef1ddc8a820b53d770d1851262edb30f9f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHNB2009004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d4d90be1b303b19e6ba63b2be219ae8368f8b23cd9c3b9cd22a05f55365e49. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHNA2274026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df3fbd6011e78895a2e14d0d7834426a09a41f95770ae601e6f42a3e13ae8b7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZHNA2274027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7620e44aa971379b5d480d9a5b50b04bd9912457593f2f1ef9898bdcc64861e3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNA2274028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b88226c5dd3aacd191128a417081770797f625c66bae4c32d548af2462695b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2441029.