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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4771228797f5a7acb0eaa63eb14fafd60879c5add531c657f36ad5d5496ebcf. 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/9b507267-0e76-445a-8450-c0a10a9b04a0.json and https://artists.proofprofile.net/proofs/artist/9b507267-0e76-445a-8450-c0a10a9b04a0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c339f232a89d6aa8fb78adb43bc7ca6971d3ba17d8ee44947b64cd8282c2730. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ22096473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f9ff8460abfd5a7f13ad274dc3f1eb15dfdc3dec5494b21d497cc8a1d4ff4b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52018711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f222f39d1adce1d429372e6680be412359f38f36313083b6e99aa572016ff3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:58Z), 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/FR9Z62100717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2eb5f572c53c4fbfbed039027f05bc566db768ec058f6640b8690c3fd5e65. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9Z62100719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ea151b8dee79613275f94d9e87c7531440857d752a7bc9caf6ec3c01cdf272. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/AUBEC2334846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37286baa6cf2680d182d6f6f7e8bc204d5b37e7fde419dbef32f729ba070a0a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUBEC2444694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb872c5cae96dae1ac8b891e6f4f03c3f78a5c66e14021350ffffa2f4b37f15a8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:23Z), 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/AUBEC2444697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525abc044370d9dbd029247ce7cca1915efdedd8810dff05b5b859d84760650e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUBEC2444698.