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 0x8d0fc49fc69d7c82ce15a3a2180bb044c983f341f29cc9e9b61d298dc6f61bca. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abae4fbb-9d05-49c5-82b0-154967612581.json and https://artists.proofprofile.net/proofs/artist/abae4fbb-9d05-49c5-82b0-154967612581.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 0x5d949984f1198205b12146d6e35094571e46d20b3b2360efcf9c210b217cb8a7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/UKXN22458482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0df5efbcc1eeac1a42031c0ddeaf41c4f3de208c0199afbbfedd182dca4c60. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZXLZ2517948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d3287d394eb72c72dc3a1c7f0b21bf41e76d12116ad5fd2f49000756e379f. 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/UKXN22061766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb6d76f7268744ff860bcec3ce64d50e5e291104f15e9792be8cdc90190d465. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAEJ1952329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb6d76f7268744ff860bcec3ce64d50e5e291104f15e9792be8cdc90190d465. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAEJ1952329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd85162b6e828e462d39cc8291d44b8c5eed8678377a9122511665da266cab. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GBMA22489969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b2428a4fc50de7fa600eaf1924946983f0b61640ade3006c2fa2696b17bc51. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXF9Q2417605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a734b249b9c3362ce9edd29ccd29b4153a62e5a399ae369caae2f653438305a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXF9Q2417606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9442d79a83cd38458263d6fa1a4a1c546fa163a5335008b1011e09b3b77e24b. 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/GXF9Q2417607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc708beed5bf7003e1bb5164a0c0231a3049f6034f25aad8c95d25a123ea67f6c. 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/GXF9Q2417608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38f074b17b823cc49d59f73f355dfb69f6425045fa11d855ac6cee57cef26c7. 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/GXF9Q2417609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331420c08a877e02fda1a683eb00133bfe8a6098ef65103e556c6a7431ba38c2. 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/GXF9Q2417610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69eb7c10de63e7d737c651d14490788f5c20634367e9399644d7d641ba440dd. 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/GXF9Q2417611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c57409bc34df81ce5f5d5694aa720861e2c004eb8bd225649c843877a123e57. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXF9Q2417612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a168a3f71682b62624209e44b97a062159555d7709fae787be5dad96090f97. 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/QZXLZ2517051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f38a91f649adacd348cc1bda916edd6979789ae3a9dd3bfb2d11d0ab5b56c7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZXLZ2517052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e2ae1d8762b329e9cc77d5247f83c6b3b1ca40932bfefa08426c21898ac05. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZXLZ2517053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf458b9228e6e8ef93fc20ba2db57cc277ab7196e094ebaf98e9d4ea62b002286. 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/QZXLZ2517054.