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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7f84438e23adad9495dc354d1364b5279d0486bc282a8ce7d3920fec565c0. 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/0c5fe0d0-cbc3-4fa1-a647-eb87f12fef02.json and https://artists.proofprofile.net/proofs/artist/0c5fe0d0-cbc3-4fa1-a647-eb87f12fef02.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7344e5106ce7f58e90b2f3ca12b215d5dc705d6b968c6cb97978074ee27b7269. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ESA012143342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758bee64014547d66601aa1bc8c6dfccaa244888642ae7d4082818c050438754. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ESA011657012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827c11b955a6ecabf0ba22601c030dd7299670983d5d3e152e73d900d48f8d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM4TX2290659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0196add4a59aceefabb77cd2b93afcec8411436c963ac100b87dd67275589f93. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA012220913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41fb7519c51965f81e11b500462fa4858fbaeab74840656c44ce514900599e4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM4TX2290658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a1bbec3c02290a9b55e4bc0981c319de378d19756d70ed78628c089c955b5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TX2290684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d8aaccb62494a5095ecfd18128a7438211e87800d8be7e26dfdb5584acf741. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM4TX2290698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae464ed94c2b172f110f9354c1c86006b7eedf25341e61cb58285a9896a38a. 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/USCGJ2403563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0dde366506e4ef5fa9ce71e2e9137d46480f31bfcfd7d73eeda541555812a4. 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/USCGH2412835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834a2eee63a90b468b872006a6de8198917d2aa5db8813d7463d75fb47818b6. 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/USX9P2315983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc50344bcb961d1bced55aac8bf30496c39b59f423d818b2ea6b530f4a17912. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USCGJ2403566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d966c85d74f08d60ee0967bc787ca40f3e7a080de3d837be51f5d494c46f31e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USL4R2417691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80da0face4f170d93d6448983f91f0ccfe5660b85100694333bf2229a66e5d16. 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/USCGH2575140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1506db59d134db7f73539f0188a13c794a621ae80c9f05acdff01d1c67e1e1. 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/USCGJ2539751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377a272ed7f8f36a69649a1596f0b4c38f21d862fdd87796c6f3eb0a6a6b3c1. 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/USDY42560875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c591e20e9e5436c7639449a31e0d4ffc124629399a144129af9085c4d81021. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USDY42505633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25108e57231ed6154033449987204e776c1972737fa49ff1dfc3ce8366f6df30. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USY242483735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9fd110a91a73624e5ec8278170c9a124f5194ca77388d90b2b459536d7ea25. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USDY42560876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d966c85d74f08d60ee0967bc787ca40f3e7a080de3d837be51f5d494c46f31e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USL4R2417691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193ba8a23183c2d21db31aac1273d9d97e8346a43d1156324bf79c22b0f72610. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USDY42560877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1506db59d134db7f73539f0188a13c794a621ae80c9f05acdff01d1c67e1e1. 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/USCGJ2539751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b1a254d135380265180dbf3e262e37d5a9ca7e91a3a9fa1fc3fbf19bdad5d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USDY42560878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4896a35d5453bfdd812ad947909a257889e8f4f7f42110de4635ba9b746752. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USX9P2417600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b8056dfcf4872819fc44490488a9a7cb5cf4fa87fae96876bccba5c6ed2d0. 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/USDY42560879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80da0face4f170d93d6448983f91f0ccfe5660b85100694333bf2229a66e5d16. 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/USCGH2575140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6e85115dc6729fc48f237bc8484258d6e63beff01b7cc34a26c687309971b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USHM82595609.