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 0x83ffceeb9931d6e7890fa83c95be5c01f7e2b00b91b303da4aebbb05c5c3c02f. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97ecbf87-14b9-42d6-9c26-f3a72b842327.json and https://artists.proofprofile.net/proofs/artist/97ecbf87-14b9-42d6-9c26-f3a72b842327.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 0xef0c6facdf5d4719efeab4821ff36388d12b423f61b65f0184a185a79aeda7ea. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZDPF1807366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b4e1dce8863264f4e98b6fe0ac2d2e2d09210259f0da653117e1f0b713c30a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDPF1807368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8114e33eae5dbd0f3df5a107cd023c591f0a520c617e54f7ca4b99f82419c6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZDPF1807373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a47421dc8adbede4bb4a440176706d4bf79c5c5c18b963a7bca79c79eb55a2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZDPF1807375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7cc2586df7ccf9fbedfdbf6ab8d199f149d1f256301d72311f01892263c58. 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/QZDPF1807376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1eba87829d362a4d7ad9c488b10d1fa6711714a1a3b15f049eab8a297f9212. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZDPF1807379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14472f5858b76bb623c3d1aa582a7ef685c01ca40e7edf82553bc3edeb8408f7. 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/QZDPF1807382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e8e75d390536c465a7ce0e5f8c6a817b9ab32df6ce57a3c06e4b7a07828a91. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZDPF1807386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147ee31c59ca0ce992bd1ab414f3cdb3ff57f32840b6a2f03193834c0e91db44. 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/QZDFP1814302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733d968f1b995e461305c91ce2e643ccac32cae85cbaffb583bba4ac72f985c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZDFP1853361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bc5035c099fc1fa4eadbc97ff7207f76938b2495cb2bb33669b1802c250eb5. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GBMA22350189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecb02e16a25abd1930eae5e3ed51cfdebe023c1c77494a35ad40e8e40dac2e9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZDFP1853366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c876914b21a604bb4984226f70296e7727e0ea036f6faf37a7afedfdc06db. 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/GBMA22350195.