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 0x20b47a1cf421708ab5f444f94649ed86b4b41129b9aec23649d2a9f57c3276c8. 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/3ba9dfc9-dcde-4534-ba36-4c2c17c92c3f.json and https://artists.proofprofile.net/proofs/artist/3ba9dfc9-dcde-4534-ba36-4c2c17c92c3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xeee3f2227bfc2d60788c81d90226cbad0d23371ccc1583872da04d03ee8e9fa5. 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/QZMZ92510779.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336c234bfd349fb6dfd660fa8322c9a8ffee238072de56231bc946b77bce4469. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES07F2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e31f933c26cc01c88a7dfd9072d47ad0d786b9e5b133391e3df5302666d464. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:53:56Z), 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/ILTON2504950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98db1ecc8ee6f2f43b24c4c7fd07c1c9e68895ca1962d3bc3f5ba8eb21c4115. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJY2511576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328bc2547c399c95a1272bf5601993a67b6facd3f15545bec9614ed4f4d3ade1. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ILTON2505476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c59dcabeae60c822da3006f2a0243d3a26ae693bff347402253d043a310fcc. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:39Z), 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/BCFSL2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c6c727e9d5e3129b39771a7e874381732fb1644e72b4763d100f93e7d1c395. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ILTON2506489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59954c25e8e8514484fa74a971c46bddce2e831ccb89d4fb15a2446bb9862416. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BCFSL2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807101f047aca3de5b1839d0991afa7cbde62231d52c5df2fdb4d26b08a1378f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:12Z), 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/BCFSL2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d76dc7a404b00ab5e10ca777166eeaf21230c8f401baf6fb692b21445c4cb. 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/BCFSL2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a8690cd430ba86a638affe7fb4ee682aee14d1780e6fbc08155ca64730eb30. 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/BCFSL2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0582af9ce7cc1939f7dca8780abff1dc4deece401dc3c58d35649998da61672. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJZ2595478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce7402bd351aa8a54e8e66f2cbb168400eadb798a623a2633a25e80ed0181c4. 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/BCFSL2500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64c73fb69b7f704661315898b67aca79f0509bfbc6022b05e4b8e98d30b980. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/BCFSL2500046.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5cd266c2da82b89fca564311134e310bc39b5ad25fd063dfd360e65027392d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ESA112456196.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d18381341dc4bc862311798179995d44ff285d66a4387e1bc2a485468dde70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA112557955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a468f7199c2c9d05fa6953e92c7b1f68e91333c78ddf9dd6129138801bf959d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLM2559801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4e2c8aab0ad26d397b7077d5c9a945a1a38b1e2eadd24038773b58449ecaf. 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/ESA112457696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155ab902ba0ec2c5094bb50c5551ce05e77aff30e667cfaef5edd964da6803b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA112457695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a404dabfaac3474c6a61a3fb38407e53a806bd6e1d1746cc4c8b57b4c02ca39. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA112570459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5a901bb07a90867d59637fd643ee4bf5b69edda7884705461361cd630d11b1. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/ESA112450571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec67050bd43d42762f30dad238ef9f07c03016844df7056efb7f7601d6004e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ESA112565574.
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 0xdb3f3559753c5ed08432f8739d76a4584ca0930a35519a03ade57cb4d49ac980. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLM2571251.