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 0xcdc169ad2e318f74c1d7ffebd6ca04476884e50c10de4aa8b8de65ed31683951. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c133a7c-1a14-41ec-9321-152d879d09e8.json and https://artists.proofprofile.net/proofs/artist/5c133a7c-1a14-41ec-9321-152d879d09e8.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 0x8473ae5ac8452f4fee121b61b90228c4ab64e7f0078aa5a6207be56eafd76945. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:23:17Z), 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/QZGLM2174314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2dc5073ce579c6696e8d8edc4c5c3deb2f59034db4f82f1990878ea4c974e6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:38Z), 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/QZGLS2148844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce06a080b47edab19d75b87cf0e374c77884a0f391c5bf31fa793b26d3088b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNJX2143769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca514fa54960538bc71e0fef44a626668161c0efdc98e3f4d8c9647fd69b9929. 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/QZHZ52231218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fe41c3479404d977b2b7184054e57ca1cc373fc042c81737d60fabd6dd610e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZ5AB2323058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb593b3a050073a82b3f1e59fb5c252fec5769604a9360c9c686dc3afbbbc8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJX2359209.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284c7cafa5765561325621bf7184252d0dc209e107b33fba01c27efc65533e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:25Z), 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/BC6M22433288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9892eeae98591dbbadc9c4030c16962b8689f03e84b940571e683db13fde00a. 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/BKLOT2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c027f1cc8e80b73c5fdab3ee987f322275380db472440e647fc32e747d309. 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/ISRCQ2430296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbf60446d6a37161f2f55853dc5f0431c6543284e77c72246348f15d7763bf3. 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/QZNJZ2456565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf375b990aca7b29c4135317cd4a95ff94208d6d0b7747cf6411b7da492a9b14. 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/BCA2A2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72e509bd88bddc9a4be2e350591a1b395438830d0ec69de86e850f2b23bbca. 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/BC6M22407852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05eb62a5f0101e768a598d958472064ec6aa5e2136bc9588860784109c86260. 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/QZZ8B2447315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423f8a79de74ac3206fe74682d2ab61efa4f21f516ddd0e36788727c731358fd. 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/QZ5FN2579776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0cbc6b2deafb0dc4277ce9f931b255f7e732a568d89426bbd7a43b535c42fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCHFD2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05eb62a5f0101e768a598d958472064ec6aa5e2136bc9588860784109c86260. 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/QZZ8B2447315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e04cf0b7947b7ba818d40966065c692f7f9ce778b0ede6a1f7897be967a4e3. 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/QZNJX2395683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cb4cd3bddb66c0f78b83d560d9dc72c0daccef34fdbba3459032b116b6850. 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/BKCMX2500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a73007c2987650a9f95d27dc6793fbcb5597ed42c00ce34918685f8f870954. 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/GBRKQ2589498.