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 0xb224f11dc2bf9d2e2796961b9d81419af5de6e7e48e8ee0eea008a38ae84d045. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a0bf59b-d98b-466f-9c3d-c33ebf7d4b55.json and https://artists.proofprofile.net/proofs/artist/3a0bf59b-d98b-466f-9c3d-c33ebf7d4b55.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 0x1289f57dad3dc8b25aa56f8afbaac785b55d53b19134e50c81ed37e83acad75a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:33:26Z), 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/QZHN82546894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d719af24d3fb40fd9e77197924087b1664597b63f63b21cd2ff0d647417ec48. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN82546897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff81d641689255bd1d7958822ea3bb0563eb8d0af338d9ac4918fcaeae04066. 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/QZHN82546899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d089c46e470db730e60e9c20adaa8fb83b84b8b579d1cf762ab41dc76d1014. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN82546900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc499e8c5195ab9353888d38eb1885c53792971e66c6f96fe5d062420f87664. 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/QZTAZ2572341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f11d3eb2bb018e9f687caca3cb745100e60171fce2a3d893fd75a59eed1aa3. 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/QZTAZ2572342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f139f9e03945e337c9d191fbdbd0ae99ecc541e17390d56742e51034f3872. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTAZ2572343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5b87830d0fb8625bf67053233339230ab1edd8c9c74b8590b8b10003554ff. 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/QZTAZ2572344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898013da607fc39e790e1e3eac751ad61e685ef57b3a82b9e782d86609c99c6b. 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/QZTAZ2572345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869ef2b25f2471113a01c8528d66ba6d262da9b146b633571c4a6b741293099f. 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/QZTAZ2572346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2b409de0425322937bc6c1fe80cc0f037f0d985afdaf24675a03a0988864f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAZ2572347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1680a5bb3b4b74ed7d817ed729f439a66675377f39add217606e2ebce19a22. 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/QZTAZ2572348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b74627e7ceeaa0b4074bc4d03edaa6efb553b790ea26ac8b6c27e489568b2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAZ2572349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43eb75e1c840215ea73b6c7208a21b48fec7ea248310abe2db27dd1a0baacd8. 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/QZTAZ2572350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7b38d8a48e96f744ab988a40696ef786c1071c126a43a7e7d2c2c07481bed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAZ2572351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e7e7d88e80090f2790aadd52fff67a9c6caded8c7e868a52a624ba7af33d26. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAZ2572352.
Clubbed and Dubbed (The Remixes) [Summer 2025]