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 0x018718c476389e17abea5c51720e8d30d981e1dcdab6e3e241b7c273641ef6e0. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f83e2985-e24a-43e1-883c-4180fa702b67.json and https://artists.proofprofile.net/proofs/artist/f83e2985-e24a-43e1-883c-4180fa702b67.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 0x16c7b7ff2cf16db45a5e3b69bfeb90e778c6cd6adf88db51c3b1c2c2d3d3b595. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:02Z), 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/QM24S1922147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c4be55acc654ad6c8b127da9fdddb088f96cbb0039ba1da845b162d4be773. 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/QM24S1922148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7608997d1d057f1c74820727a3831cc1ee555b1dbe3f79ea59e075523958d34. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:56Z), 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/QM24S1922149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663281f90971fc99680d1d6da7f6caf900ec5f455fdfb5a65781249ca6a864b3. 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/QM24S1922150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d19cb0d5ab79c589b278f7685ce38c0ed76817c6f186ef6d29344c23cd28d8d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:14Z), 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/QM24S1922151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe68fe383ec8a448714e63534ede96570b7c2c8d0ec61f585f293aac22b1787. 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/QM24S1922153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92f61894c1fcd47c26bf16fb5e3cea9d5bbadc4486ddbdbc191fb059701e3c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM24S1922154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db8f0a18b9489235f06307c25757263761bcb64cbb5d3c947625c81bcff7f5. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM24S1922155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd91227708f4cea6159dc7dcbf74771684a2516a6cc217ec919c75ca6a27299. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM24S1922157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f798b259cdede077f836b9b2f04a051de5fc7919fd18c00686cb4a5d7af9f09. 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/QM24S1922158.
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