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 0xdb52481e750bce7d2bbc4420465c206178a37a4ec1d7211c3f1efb37da8c4692. 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/641f5310-4da1-436e-b394-02d65de4ce25.json and https://artists.proofprofile.net/proofs/artist/641f5310-4da1-436e-b394-02d65de4ce25.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 0xeb87a60da5d0634103db18414ed183fa1936fb683ea01502f2a078a0cd913e69. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCADI1764888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62706cd8f1b9d117b3acf4899b8440844f399a0c94dd6e9097e4f3beeaa34abc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADI1764901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2966f34b777f494cefb27a7c32d0f5300167bfe154389da7f74426fe4744ef. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFYZ2003562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c242ea213188593a1ab681fe297f45fe81a476ad3691f57cd0c122675c54bc. 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/QZHN42071263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d05fd96a77a33b6630c0bb3d9f0df17722c04e99e4a9bc27d7b3bc1d666a1f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR2X42180007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2edb3ee92c68d8321f7cf898f4e68a6c7a0d80b2454065fcf1f9891a22ae078. 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/FRX282272712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c195ec1f12e3180d21534b04d56c1117f2301549ca8cc839f7357a3b96f576. 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/FRX452308754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c329ebfb019bad149af1ae2c3e425c10a2a25690943fafeb6a20c473875f4d0. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBPS85336797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346cc5f5da2664244145eb5171d79bb201b8b49728e06155e0b99709417f1a79. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR2X42424487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda54bf22530197b636ebfaf7bdae9997a91d3ef25d6913ccd7ba1f42e458b4d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA052458958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213f8e2b7c16cdc3f3be833907d4edf55c9cbc716a9e89465f3b101e9e0c21d0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DGA0M2463637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93282deb56822f5e3f175671bc71b4af65be15964460b6c74d96574c2e60f244. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0M2474799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d33c3fe8ccf44a55a33ce4537bebc06408bbfcdd750bcabd65e96ee4931252. 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/ITD542500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebaf5d38d081cbdf647b44b79551e4838fa98526c3a957adaa1a09a6cf7edf9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX282592804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302bdda6db4b08ac64d44d03a7ff7d90e6860d40e2d12ea6d09acf9ddc8dc495. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX452517436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee580a25dd27b3faf4d928580b466e43a5c55392f5e77860112a5df90a281736. 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/FRX452526596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e63623f894fa0052ea316cf3228874e8a9aa5a857c3e3da0c728f0cf170df. 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/FRX202409133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe329443282a45f289e6f1c01b82b7141c18039452997606981cc7a628d29800d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA0H2303337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c242786d545f13708e1c36c80497046ed887a1d088e4b468ed8a2753a3653e. 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/FR59R2244153.