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 0x08233872cd277eb974a992194e3e397fcced78b4e89c73cb92652501310fd9b5. 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/19e878c8-ae9a-46b7-a219-01d3b36c71ad.json and https://artists.proofprofile.net/proofs/artist/19e878c8-ae9a-46b7-a219-01d3b36c71ad.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 0xcbb7bf01b32cec2886acb6d74cb18d053bce486bdf051d74bbabc2637e357be0. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZTB92345934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63be5c7ab4b6b9ba2e06e83d0a5eedc7d29f771a807dfea474358c25f034bb. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZWFJ2304308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8969d7c45cc90a45ca7c2ec906ef3b1360976a4a083beeb1d639972b95274b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7U2419841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c7a75d68bce4dc7992ca91cdad1b85a3c5212597f5bba88cb99b1d3b59c80. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EY2466361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abcd5d9e724713cda2d0be453fb084b9bc27a36085d95212e962a11166cfaf9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2523778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7856c19cdba5190fa7de88bc665695272ac8c82534e317ec2a448da3464a5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFF2586268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd407b3afdaff3d6a11fec2d9eaa3366720a3d8971566c8dd5cac444b9a99e852. 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/QZWFN2554636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500ea1cd916ac7b00f7a213a899d2b4dcf64de71b526a9949395c943d55e95f. 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/QZWFS2506320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49818928d5dfbd29021c8ff8f04346b96552eb876d15511086ced57f7c8c26d9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFV2561732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0acbf45f0d37b04c73ccb670f6c2561fc02d15dbcf6b3e7e5730a7c3c3d13e1. 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/QZZ762592536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7791a1c819484ac3eabd03a9ca3f794aabce43d67ed9509b2adc06f2ac9c2e7. 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/QZZ7P2530445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52e2767bf8c30f4b63209c53a6e3251bc021e486b15fec1c4c057a260e0240. 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/QZZ7W2507395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafc7d05af69815a5dbabf4c5ee75c3876cd165aa802fba3ff03804946f2ca2f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3FH2502297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a973aee8f4ee79e2c5bed697ebce0397f9e0121a3e408a07217414111cb65ee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6E82537933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c6b69eadad3fb5115fe6084eb9be8ba090aac1ee665297ca746b233ba2a77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAX2409786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b72ca6760b994f35c3e7e6cd6b305b76a343f7c0882a109429e72dfecb67c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN62443358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9053eec7b0131d13e12fc6ff21cacb91b8f97c5257e2a168ee73a974ac6cd6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFN2312381.