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 0xa97677c8fe1eb86a390b29bffe5427253c622b1d858400768c7dddcfebc0d433. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfe58739-2619-4534-a4f8-0dc31f4d4e9f.json and https://artists.proofprofile.net/proofs/artist/bfe58739-2619-4534-a4f8-0dc31f4d4e9f.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 0x073f467e51f84ca82aee2f2aad495339b21e3d986154af79a9408a1c306c7fca. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:55:22Z), 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/QZGY71900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6d3cb179b69f77b2cc2d74c94a1984ddb0eba62433b7be1c355eaf663045f2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:44:56Z), 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/QZGY71900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d900eaebbc603187cb230c4f8e24a760735dadeada8024604179b6504d43f03. 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/QZGY71900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d224237442c7ae1b4f99bc1f717aa4163eb92f9c7ab07129a8b5616e7be9942. 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/QZAQT2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6900cb850de35edf277f5dbb6139cff92e0a94129a9e38f7d39d99f6f2b5a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZGY71900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5a46cca119746d016f01dd8ed6acae43693b7e8cbce70e8547f9a0a06098f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZAQT2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a3e63c0d56d1b414c6e56042b17de4a1d874badb65807862dcc370e5022c27. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:08Z), 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/QZAQT2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a62f2869afb15ecf37de310a2e88c0cba43c59f0f10929c73a315ba025e09. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZAQT2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a79e8135a307a455f66446fe7e55ea03eb6735ada0aeb331aa1d7777eed8e42. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY42429118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f5316c686a49d29d342792adb6831cca07f86526a09980d83c5c30b7058faa. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:50Z), 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/USL4R2503051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c003867eef95eb985e80b147646aad45b5016a0c76fba43289a727a70532bfb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USL4R2566356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb7321e8087f9fc9c57a0d920494c326bc65c85122a2e60c9a284030fabdbc5. 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/USX9P2519245.