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 0x754db219f8919e52af5963cb843ec1b36510f8d6e5dc8aae3f473a8527b89106. 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/182a44a2-4e0e-438c-9bd8-bbbe24b43c65.json and https://artists.proofprofile.net/proofs/artist/182a44a2-4e0e-438c-9bd8-bbbe24b43c65.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 0x6d13351197f1680ad27c4e76307fec4c51d4d0fbdb7259b0ea4a64a46585952e. 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/QZTB22387443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dff4fc50153b3626ddc443a647d1d256ee482ea6573e78c846279d0a70f0d1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTB22387444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c2647e33d80640fcd3298706c0c202d4c927bcd208b598ab4489646f8d11f. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZTB22387446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cc49a97fd008e071d42300e40fd83c406cd7deb93692a6794a26aa247d9949. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTB22387447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c82fa56165e6137711508f5dce3fede5648cc045a4b60e7fe7908e3d6ef6d99. 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/QZTB22387448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c4a1d6c80d2b13c21f92d7439fd68350da288aacfc0252b8e7b30763e2a958. 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/QZTB22387449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8563b20509a4bfa868976221802561c34dfc9d0a6b16ecfa934228865e83657. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTB22387450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9335f5448f85494978547277f8a25cdf65fbd8f3dc8aa6621c75d9bf3be670a. 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/QZNWS2215935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255d62089ba7e553269199364cf750760e4d773319ddded522397a435ed63c3. 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/QZNWS2215936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd50a0bdf00b2dae1946b9fdefa74ced4aefe4e89a3c06ca872172b82b9a0c00. 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/QZNWS2215937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca99efcf77f386a82f2713615a039231ea040160cbe59b67401c1e2ce15d839. 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/QZNWS2215938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe475fffcb41f50a79a38d561fb4b735199368b06323b6b8feecfb3b1a412ec01. 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/QZNWS2215939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8343ed7f798c20cf8c0b6b1a697530ae1cd717768f758ebebc555c076916269. 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/QZNWS2215940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21bc7c60de5a05d5928e6be54ce93cf435d85085b002ffbfa5e196bbb31c8d. 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/QZNWS2215941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042763a5ebc8cd5057728bdecee461e497bcd4a3223339cd60def1f94f358ff. 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/QZNWS2215942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4713e2a8f67154e569e751242ed19c8fa5bef96f0a9269fcc771838da921693. 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/QZNWS2215943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91374d1cc675a0a8fca211756f040f3af5121f53a165782c87032a81d831a394. 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/QZNWS2215944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fceac5c5e211aec20ba74cd840c405423b60c1ac5591c48cb2887fa38b50f5. 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/QZHNA2258639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bd95b27483b5281c8dd44ef743d799156e47a8209aa573ac1ec4f26a25ca7d. 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/QZHNA2258640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c222b0591991ae502f6f1d2acbda22bdb4fbdd32f087e0b8a6c485c06555d6. 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/QZHNA2258641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923bf34d8757a631943c47590e1613edb29c17b60051771a31c03f710918db29. 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/QZHNA2258642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b6ff3e0d172d24c129f90f535d52e77aa1909fe5d227bd1a37e4f2378de9ce. 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/QZHNA2258643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc0adc69f55b0a3834317d86f13b5ff30c2bd3fe805e8e3d21194513f38585e. 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/QZHNA2258644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d318913a3fc5daf994aa87db06dc40dfb932c5b347ec5649d4aed132a0c5332. 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/QZHNA2258645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa5c2f5fb3ce99cb0a247e0bcb751c6ca7cac4379a536591b7fd68196e52945. 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/QZHNA2258646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9c1fe067f9a4befdf18a90305b5e626acad2c00d8c0e7c2023123d2808578a. 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/QZHNA2258647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406a0c3bc39f60435b03a101fb29b5743dd9690d4f66275703f6d45f442a454. 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/QZTAU2476423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bae0882e63bf3ee53780a3cc36522933bd03beaf1e482694c8eb4fe446e5d3. 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/QZNWV2440624.