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 0x38bcde205857cce213c482faf835476c3cc0c79e8350e066887532cd9f31da87. 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/f843b5dd-9706-454e-ab43-278a053af616.json and https://artists.proofprofile.net/proofs/artist/f843b5dd-9706-454e-ab43-278a053af616.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 0x90576223fad4b7c12d6ddd04890d3e6d869aa72b5e9eadddb2fa1732273ac498. 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/CA5KR2194804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3fd4c63fa4086fc9052c2205acc055b3cf959e994505ccd265ea3183bd2bfd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CA5KR2214564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d61c6a3cc4fba22d5a8e8645c52ad38c185832cae70ebae9f0aa685cdbe7ee7. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UKR6V2310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410e11e6c6f99bda88febfa9dbe17605fb0de35b45d14556ad340df12d624dee. 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/UKR6V2310605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30524ada37db182c459461bba606ff8e81c877169ceb087c54003126241b95. 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/UKR6V2310682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d6d17f79d6025f63a5267bd0efa7c3cec61aa4653667452c8fb89c34d21cd2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/UKR6V2310856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d3c05527941e4a681c607c8c9bf586330d340d033816eb2ed2a5b22e724d2. 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/UKR6V2310912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0967ff2a1e26313c5760dd782def4621288b3fc56bcf04ca63749f8fd08ebb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/AUKDT2300560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3b3b4d43063b1fb8e186729bfa78d0dc75b9b3e0caa902aa83e2a01f71bd0. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/AUKDT2300822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ca4fb3bf7d3a9ade242806fe4b2feb78b1cea6ef485c3353428057852c2afd. 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/AUKDT2300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9b0d942da292507344acb7483ee005093b1e4248b88a43a73181f8fa47359. 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/GBWMY2402500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b792543cb8132b2c9e120a372b7caff1178b58f2297b3c6466347c853ed0be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR2528404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f83388239578051274225190f07b31420416e4b2b5f9530bc2f189c7d73fb. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AUKDT2504299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26761fa66c1438358e3ad77359634c04f4fbe77987fa784ded9b070d116f54cc. 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/CA5KR2533515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebae93867b2f3e00bb2f3bfe46b13fe74d16ff2ea2ba808b94032b59b9a0ff6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/NLAM42500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a0db6cad0e1a897e9b123698450d9d4dce6d0d10a39685b4c388cc85f26c2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QMFME2510629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb130e4910c983ba6eb10c637e82fd383750c963d22b251904be3cd71115fd0a. 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/GBWMY2500700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c78cc1547688d7bc37d8ba27b9a18ce11e4946792a71637a80160e600bf48b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUKDT2300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb114ced3c0298ac34fe46e49f63ae1faf4ce589162d3320c05e5435c8a4f74b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUKDT2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb114ced3c0298ac34fe46e49f63ae1faf4ce589162d3320c05e5435c8a4f74b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUKDT2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c6b4b46cc46777bb262beb923b9be635b9d074f8425400cc3c769cbce7f89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUKDT2300132.