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 0x4209fbc37d8f580a1ae244b1162a19ae5c658fd31dffe1f3ea043e366cda5db2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/492a0466-2b03-432c-905e-4711d7a082f9.json and https://artists.proofprofile.net/proofs/artist/492a0466-2b03-432c-905e-4711d7a082f9.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 0x850833cb2929cd69bae400bf5d76efab025327846acac6b4f595ee7fbc4cc1fa. 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/BXEJC1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44205c783b976272d79f7ef5532b83e11baac2f4449ff1cf6869111f026d505. 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/BXEJC1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe00457669c05a06815783fb4121f6c14bbedd8a12a40c3f9264b8c78e65e326. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BXEJC1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf31f90bfab8c5c7d45b539d29403440ccd5aca0104dc9243d84493a8dd6e23f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BXEJC1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9d8c22047c9fbce0064ba93f2818c77701652506971c3a8cc3e6dc0130060. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BXEJC2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecbf5c6aefa51f667088b69aabf03edf2f37a866b2c76b1512be6c266686a76. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BXEJC2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77808541ec794c62011b58f769c11b9e973573045aeb98c0c2f22fb968926d37. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXEJC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015a82eb1435a38417aec9d7dd7601d1596f30dd6958ecb37b658fc328fd28d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXEJC2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecbf5c6aefa51f667088b69aabf03edf2f37a866b2c76b1512be6c266686a76. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/BXEJC2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c9e941430776060505c3b397482bf170e2fd61f27ea014c72f348f1044a15. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK22I2500008.