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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 0x5a9d637dbe9d1364735e985fafafc8776545fc01647162042d44954b77b17a8d. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6281d896-0c0d-4b9a-bd51-64e60bc6de22.json and https://artists.proofprofile.net/proofs/artist/6281d896-0c0d-4b9a-bd51-64e60bc6de22.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 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 0x648f89441f60a223eef53ec36c8a47b439c6c2e276d8fd2bc03b8927f7e4f821. 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/GBSMU0035168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fff29bb78446c7046904c6b2d5c972629b784f56e46f66efe38ff2914cd774. 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/GBSMU0036019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9358d247968945aa7c83bfba02d47738efaf1f2ef0e71244c67849f50804ece9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU0036035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ac37d2512af86cd4ed95c7b8e126f5cc2759c362c7493d9df3b318d19eb84. 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/GBSMU0036036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6233522cf48baf834461b51bb6be9bc187162212272dbc1196f424ff1840551. 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/GBSMU0036037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802087c9040b87f6206d05e9db22fdd47e71adaa9a9a97ef0244ca80efed5ae7. 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/GBSMU0036038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57c4fad6efad543339838dc6501e1609cd4003fe3e638818e7083a9a868eb7c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU0036039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d789eff0401f13659fb678e3d420a877d4eac720d26629dc939047f540478. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU0036040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e267c30939fb1f869d117018d6d3a60947b5e0c62f2c8f5a96beddb834de8d4. 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/GBSMU0036041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db6421f5066ed5f90289104deed3121b1e27207c4f9e512369b050b669c0e3c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBSMU0036042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a2e6b783d9844b0b83a2491902c54edeec8ee4ea6c334a87551eb195d1716. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBSMU4897472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b0edce793ec5ce6f5795e8e3ce0566def7e9932612b264b046d92a007cd048. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBSMU4897473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef36b455f515ed0f6092c5d8277f9f5718415a81744ee5d987cf5de067683f34. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBSMU4897474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f53dce03a5f9dac8b01f7800ad31dfb84e53541ed723e3d8732416f34a0a3bb. 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/GBSMU4897475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb08710def7d3799af9f032329d53579df3eef135110b751bc86af359fda570. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBSMU4897476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ea6b81661686b8691a49e8bbf178f53c8ff5680125ca5d687577b0080fcdc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBSMU4897477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d2cd8ec3da6f09a17d2925888e5969281d60d41a9ca437e52c072f0b3eb0a3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBSMU4897478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d5eb5e046113c7d9a12acceb6a93fe4e80afb860d74850d7364d95754eef0d. 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/GBSMU4897479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0bfb3be21dbdad7e42c9c587e13eb215d43471f6b99c1f2247015763a64e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU4897480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a1c7d8e44acf95f64f9784aab8021d2a4ee638029c993ed097bd67d5bc732. 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/GBSMU4897481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66abae58bd20b13a4f9e0fba0096d84876b15b3278444cc54142483babb2e3aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBSMU4897482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6a58cc8b6af0017b6a0c2fe245917bbf0932ae7bd9e0afd914346ef91599dd. 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/GBSMU4897483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10741c9dc78d5c649b91e3c726a23fa91862e2bde9a75377291b621b2d04c557. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QT3EY2469900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecce742374d1e1474ae5e7c22b6a3dcf7e03b89160a1ea6ed880ab4c00e4b39. 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/QZWFF2422370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b60607c5fa0d1061112046eb9bf3ea78976725c297b7b10b43e1fc0419efe2. 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/QZTBA2403133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb13b0132f21cfcde48e3d93e4c4a7df89bfb9a1f290bc70cbeec19e3774f4. 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/QZTAU2469633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc10d9ec36e3bc937c1eeab73684ddded2af35f9ed50b77348551efcae15ef20. 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/QZRP42403427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc22e633f59ca52a4ff90a6d76230cf9047f2d4d770e994381cfec4691c488bf. 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/QZMEN2406338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc477e5c0af2abdeacb755f97786303552c83bbc1b233479cadb1d8aeb8d2bb01. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEN2446532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33656430ffc4285f70d53a84eb9be65524aa918a9222302f3e80a209fa0ea58. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX8LD2324802.