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 0x16d9d4552b52630d589b42fda5e7422d0747f59ad32a47e2396d99b04545a043. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e7cec2-d004-45d3-902b-410bf7de7a5f.json and https://artists.proofprofile.net/proofs/artist/67e7cec2-d004-45d3-902b-410bf7de7a5f.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 0x719476a1d6e261b40d89f0bd8b98d0f24af32625b530f662d17bb4bd6ac14e2a. 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/QZK6L2519328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50e5eeb65cbd7c5eeede79866f4533597b1a62681ffc06f882381e76398f2c. 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/QZHN32582077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641ca5532695a49e1b56d1b55c4d477cef9ee93446293563dafe29f21596ac5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX2514008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6516139471a3c3ddc087ce3cd5f82d048e95d5acae6ed0ce4d6b64ccfcc7667a. 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/QZHN42366557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708ef1157f1dd8e5e868da64132f5214766a53290ede30d8b752a8c37a91cc0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6G2291996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7b7807d91250f65addef880d25d6f335e8723ba354e354e2082adfc556e5b. 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/QZK6G2170975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e887fcf436f1ee9be6ca2a3c8e4e64c9ed5d4715d854b00b1b6e8bb20ab30. 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/QZES62144453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe21e28cdb66a51cd496c45f39b61ab07425123572449bfb99e74f0a993114. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWX2012979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8f957964f19752ab70dc64a9dafc36a84adcbf5f9a3149f47542eeb49ebdd. 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/US23A1501854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1272e6b8951a81a29b7914531f1fc6bff163e012552fdaf5e381c3c6d4e56. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1515030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdefa071effd4522909432751a30b09c64f1ade3db1fb5e622c6d7d97dfee2e. 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/US23A1515029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6624d4aec8eeb3b182a569321579d576f3a6f7c39c72283bf0378b6b26209. 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/US23A1515031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4b927134f0136a124c766945f733e38c1bec714ebef9a507282d657f98dea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1501971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae3051e4e5c25670c0f7ac8c95775e414fdde7c615c0b57cec07fce1775af9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1515032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861aafe8f863fab020159c9764d5d4a41c08368ad70171c45c44de5fd9de4f72. 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/US23A1501541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f843eea1c5d0397a9dac563cbde7668aca6c36b27664e22337423f9d84c12. 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/US23A1501601.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c2a141387cb6b5f6b6f467324eef9083f10c9b265d4ccbaf73b7bb9141976e. 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/US23A1501561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b93b8828e06b1555d63cf18b1a12bdfd6aafeb49a0fcc0566b0bf02507f4eb. 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/US23A1501694.