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 0xd13c08bb5cc7e46dd69281103b9e80428671714c7aa6575e6f95b02cd0a5fc80. 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/6f2f43ed-6653-48cb-ad8c-92479db40c5f.json and https://artists.proofprofile.net/proofs/artist/6f2f43ed-6653-48cb-ad8c-92479db40c5f.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 0xa2049f0f770bc842a5107ff1f750259683f7c060f6fff590bac968a895949737. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX4R52392851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d64214f72b4b0faab25313320226695b8e43aa51f2c198b4387bbc2243553b. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GX4R52347581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd04442d4cce80b4ba310016163b1d4b29dfe6b77f003d7f35b2b7264c8b87b5. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/GX4R52367479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb53e23c4ba7be99bfdf3d90b76a4245542c8dbf46f611867a3be0201df0693. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX4R52356963.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3342cf3b156c9bcbb45e3d9bc05169cf5062346e3c22a3193cea113efad59e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GX4R52398725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53220c0a73a75b2d444c798fbeb468215412c89fa04da65ff2e6ff5239a8616. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GX4R52349766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030f9f8a3e463d43bcf74e640c25079abe884cb5ebad3eec75ecf7656ed3c29e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX4R52305837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93340703d387d30407a00e3152d87904b11810deb25ba84e1b545171d72e5226. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GX4R52364008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba063460f28f692ffa35bfe8a70ea2c1e40bd92409c49c603538dc237fa6f6af. 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/DEUE22557998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be0444a1fbbac22dcf2070380581bba94906a3595844d24b42f824159eeb2d8. 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/DEUE22557999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd92a712b89dfb7f1fd209ceeb7531f0f69210edc436b3cbd6d8f731e5633c1f. 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/DEUE22558000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f3fa5c66128cd93b715bc4c151d1634b0e7ebe421d6f24235cb9cf0f4c700. 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/DEUE22558001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782bc4a5064b1890cd41859a560af5a30f137a1f1cb866eecffd04f2d97f1bd. 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/DEUE22558002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112d4ce6c4a3aa0b264909e028764c6fb364059c37038b91a3f699e5e87f8ec. 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/DEUE22558003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba13eb89c11a601b6514e6328b39316c4e7a7aebc698557e3e7b7139107df4f. 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/DEUE22558004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387ad697918fec372e6aa1f37ccba794791a9d8d654015789cffff91726ca23b. 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/DEUE22558005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef359e578e0207f32c3c86f37d17a585ca0637cbf86e4a37a656a24392718a. 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/DEUE22558006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5ebf00967957bd4461d4770844307dafea5df86064f2b9c3eafd63692fc21b. 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/DEUE22558007.