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 0x341857d2828790c4c5c6d83c0f63aad41b288f58fa0778f4cb002ce462f2f1e3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cbee767-5f30-4780-8800-3a685d0dc185.json and https://artists.proofprofile.net/proofs/artist/7cbee767-5f30-4780-8800-3a685d0dc185.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe332a01ef834d1fa5f1045f3f5edc553b5190e202ee08786f9201f0cf5a70719. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU1964817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f8c395127a4f798e52e8833d47508fb3fef0cbe69a366314f70d43c5e369ef. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBSMU1964834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ff6105465a4e0eb45959c12c26c73f12ee3de4e8e95bc7648552c0ef68a92b. 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/GBSMU1964836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e3395b9f73390a258e989af8a54b68b05b84dc94ea8f67dbf14fa5e081c68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU1964837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee2b37e3c80ca9d2d84b557e089f615be49408a85e3c448988bb11f540c033. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU1964838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a0ab3fdf6a2a945eb928561603ac7cd92d2558da918fc30386de4802b1afc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU1964839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3759bbe38522095e5a823720e85f907334a9f2242a560fc675d4f6aa48e404. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBSMU1961651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405b2083df5eabbecf83527111e28d85ba8240852d7e08e8d21081fc6870f27e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBSMU1949223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdf6e6beb76687c614222e26ce63b845d01fb675dee294125cd3f0113717729. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU1949226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854d416c5419506e5c8d192359ccc98a9dc65317490125b6ff65c466acf03a73. 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/GBSMU1949227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77de903f994860de83185a715d46519f4b598607d7ec6c4f986c124fb169e7d3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE5752133315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de1c5890013782e060a5fe399ff7903f407e13b77f296973e92e6219ad4e2c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU1949237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad09e9fb574e6b9dbe60f1af963debe9d75d0596bd12f43cca239e194d4eb38. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBSMU1964832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc87f6e522ac0665778b350a1b67113b8bdc1edf27ff22f4528bbd7042a640. 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/GBSMU1961581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77af522e61b43e0ca7b742b4b2118cde069cd743a79532192e91d1be58922b6b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6QE2329239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65517617dc718781ef5ba4a6e7889ba874291aa964ba62bf5e2bc986e856e769. 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/GBSMU1964865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e94f2741e17d914910122a05eccc22fd8ac2be8c07fdf4a304ae65e504aa94b. 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/GBSMU1964866.