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 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 0xb4d8398033db5e831f21edd3a3ac8328a039e7ec6372c5b36b92847bfbe5be1b. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/211b8db0-eb66-44fc-a8dd-1d560232ac59.json and https://artists.proofprofile.net/proofs/artist/211b8db0-eb66-44fc-a8dd-1d560232ac59.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 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 0x4646dfbb133feb9984419b2a0930161e916f47f571dc85a69c77b94bbb479e57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2040457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4184082695ee87769783af1fc206e2ea02954bfbb4b457fcbc98ff96ae8a96. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFML2040458.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59355b49490770a8c388406ddcd3ae70598eb0ed5a896878168f083cbdeb7db. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFML2040800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdaafc8c8f04738d04936101c850d361696084065e985908793926f07a49d09. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFML2040801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af27d967649c50d27044f0008ea517a81d616db842da85080d353f6d50a253. 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/QZFML2040804.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e14a61bc2e6edec641c734338f7556d6a743a6551951792d74a5144464656e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFML2040513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a610365c75e26528742412097cdd7a9b67d94e8c1a5650fea7d89700e5a64a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFML2040514.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d3b7c59dd05fb7a91e35a6cd9e117e426b0d4785d5cd5066358734616a476. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFML2040790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef81c3690de814e2831179bd61fbbcc0a69db1ce3bb1309851ea5cfa6dbcbb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZFML2040792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5dbea70fd2d5d63036e8788800fc12685a7ec8308a9efca41c6f8a7b2d1641. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZFML2040793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc6865a4374d0adc089d7c39212428f64051292d4e473d208c4ff7666dfdfb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFML2040796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4639adcd21e2f0c45e2a2a83a1b7cc82eb5692084326b15c45239814fda9dda5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFML2040797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad87152be2bb8f3de26d85b77e3cfbce2ba477bb9dfdecb1f070b301f645367e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFML2040798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59355b49490770a8c388406ddcd3ae70598eb0ed5a896878168f083cbdeb7db. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFML2040800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdaafc8c8f04738d04936101c850d361696084065e985908793926f07a49d09. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFML2040801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b929c5b100342b26845fa395fad3eb38da0a773d0ca3664a2cf7e176e681f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFML2040802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ecc83e92283d201ce159d9d1e5c5ada1253cb5ca277126289dd2f76c798ce6. 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/QZFML2040803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af27d967649c50d27044f0008ea517a81d616db842da85080d353f6d50a253. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZFML2040804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a3687e6532bb61448e4dd25ce50719afaa820a04c515b03fe677c296b46ab8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZFML2040805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab56ca63c9ae4475d47ab48e56eab5a4dbead3cc7f6b32d3d7f9815ad1aa37b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFML2040806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7164f30e923fbb11ff8d8188c259650291f1d779ab1d8d165a0abcbe7f7c0d3f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFML2040808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c74f4bc58d9cd7409776d0e568534bd73f76026afda9dbad5e80852378a12d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZFML2040809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb64ee5d1c7c172dec4f6aff28f6e864cb249045b9746b4b3c4498a0ddfb661e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFML2040811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c92b70e4a18b4f287e08358471ea79f4fb1bb2a63d5dcb64419b413e9dc41. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFML2040812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183ea8806b79411c04896a7a01b169907d88b0381171a3331881a7cc1f21e1bc. 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/QZFML2040813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53534ce5492e2462d85fe034d0680ebc5fe2719a4d4c8ecd3777f8292234a7e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFML2040820.
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