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 0xedb6f10da8bb172f1097d0802d013c950ffef2a48145c9361c5e4b145588a44a. 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/79169a0e-f3a9-4c58-81cb-2dacbc3b096d.json and https://artists.proofprofile.net/proofs/artist/79169a0e-f3a9-4c58-81cb-2dacbc3b096d.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 0x6d444d18498f2beaa05ca2d19384699a72c3bcd9f80dc25a8e63668ae0f1377a. 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/BCM9A2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512c9d128b476c851a3845f17e6a46310e75a0f9aee44fa08810f1862157325. 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/BCQ6P2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64952857c62cbe8e6e8e610bb34a46f119e5f5e94d1f1b6878a002c7fab53ec8. 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/BCR6R2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b8f12848dd68d88a76d98dd7cbe315f5e1bc8a9ed7407d2ef4c8334526794. 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/QZTPX2497978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ae04955f27d840f9e7d14c857cada18c36782d3fa0dbb6d6a2331ce35f7408. 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/BCM9A2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccdf7ff4f1799d9abd08edf94ae595f13faaccd9454b5e2409257b7f65b8e28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2530298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48eb3ad622ac799266988b2b8733b0a3915e6cc1077da3f7ae4bf8d5e0c1f06. 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/QZW9L2473513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2760febf38ddf5931f737e0e738f060b02c37b40c672feb053543406f665c6ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2428383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db9e8d703f0f6a7056719d154598cf549f08bd0c9fa49c0ec22eb9f0832a58. 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/QZW9K2411597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5699f180585d27dd9368f91ede0daf11800c3cd4bc9962752b200d5c79996d. 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/QZW9L2473518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce7295d2a385e71ccedfaaa24dcbc717f51b4f7466bc5651d920da4e6172f3. 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/BCM9A2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682488ba9af7d1beec5314a2a3eca073666b3f960d6381ac5dd7c353d4523707. 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/BCM9A2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f22a60c02b585f02b1dc56f8dee2e58adab876239342ab0514ad7c27193cd8. 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/BCM9A2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f55b9f26c140ecb3760e753a63ade6cb9f59f2dda7d75400862a755d08a780. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXIV82418248.