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 0x0db406e12d6ef1ac402a538ac2a5433503a7057ee66914d656a96c1b3936852a. 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/b0fdea10-d6d6-467e-8249-bae59814d533.json and https://artists.proofprofile.net/proofs/artist/b0fdea10-d6d6-467e-8249-bae59814d533.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 0x9e03c99b7ef32d4539e13ed24c24af10a9eee0fcc59c73fccd2c4f098cb3bccf. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/TCAEA1976518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e6ca29439504d711ce704cc3493db845d530af9d9110115b5a2fd612b6cf0d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UKW3Z2203242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411dbcd342b3dc341127b1609a6e8958ec8b71c70b8ff1e9a7f0d6aa1429b6e8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/UKW3Z2302463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67d62dc597616ae328665c308c7b2a9f553cde948a38f247d793b1160028487. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/UKW3Z2301789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27f95fb56cc8bfec373049278d7ed41656aead24a49bd07ad5d400fb89a1593. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:28:59Z), 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/UKW3Z2302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f9e6ff6443ac75d906ae9bd73378ce2ac6ae1f791c56cc8243c5ec4b9415a. 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/UKW3Z2400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f9e6ff6443ac75d906ae9bd73378ce2ac6ae1f791c56cc8243c5ec4b9415a. 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/UKW3Z2400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb85de698bd354e174ec7b619b889feececf5f6e336e49831921831e3ee72b0. 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/UKW3Z2400787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc10acc0817793441169525ec2c6cb75e97386ab46d728318a5acab62b52fd. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKW3Z2400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d51686c4f24a7178a0e24c85fa435b4c98b2759449a66354993f813bcc426. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKW3Z2400786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296e9e8e639c36f36e08eb64815195ac53e76d077ff7a584b9c12f247111438. 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/QZZ7K2491692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53229b4b42b536a40c9bc3b8ef47e6bdfd65520ed4eeb65a57ebb72181c40bf6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZGXC2500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe3e2ee988ac2dbccb494e2a2704b95e1e9d4d73730f8469d4400669ac75a1a. 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/QZGXC2500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef4680a2fd75a80f4e5d1d5c9ba11ec2018d0d72bca6949cc92130c26ededa3. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZGXC2500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66289804d3305a24b6c1356f72be7fe329a41f8a5ad519e23de4ab6625192da9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZGXC2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81173e8c28170b35984725b176dfd1dc56abf547f32ea03632f230989968228c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:09:04Z), 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/QZGXC2500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296e9e8e639c36f36e08eb64815195ac53e76d077ff7a584b9c12f247111438. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7K2491692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ca9c5eafbe0cdc921639bc8d3861c97009a736a3837f7abedad643e9b371. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZGXC2500178.