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 0xbde9c8dacb972e448d5d97619e5e915593dc631073a90ae2c5e8f0f88c5e1c12. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96ebadfa-e0a3-4ad7-9af4-9f09799e7e99.json and https://artists.proofprofile.net/proofs/artist/96ebadfa-e0a3-4ad7-9af4-9f09799e7e99.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 0x918d0d6988f322396ce51f926bd086584b9cb6dbf11803bdda16b48c11facc0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLU7E2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486f46758c539a14f8ebc326251af2bb112d03ba70df53042ae1bcdb470c63e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLU7E2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd736366eb253e621cb468c468176e1f3ee89d288d6a4de531d02fe4b787a97fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLP832100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432134739c4f8eb623c39d3794906e7cfe1b434361f2ad84d9c049911e0f4722. 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/NLP831900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939bdc0cc9e0c1842f28fac1d193ae1c8486dee975f7ec69023b8fde0ae11fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLC110700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ff2f04b861bc1a2a18c23d0c082321e5ed1c69c5ac164d738fd25fbcc1c638. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC110700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf6c4b9ab78716876e27c962ad7a116ceba7d4e878b319fa369c14876acba6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLU7E2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5948db3e64221f81dedf2773ebdaa4b8d3c6c99072dd57a49a1ebfb1d235ab4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLU7E2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912da46df3f302238f4275bd85f7e638c6fa1c8f253844bf340d1c2e024673d7. 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/NLU7E2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb506cd38dd82f014242f2e489697f1c34235027356114662689c80b3c0e9b3. 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/NLU7E2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c89f6f4b3d0bf46eef374ed8eedd7972e72a58993ebd13c7f84a026cd2ce8d. 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/NLU7E2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f36a86723ff31e3b14c288ac77270c2a16cf8d20a43f567587b8536f00bdd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLU7E2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee28c5b8f90731a97078f12eab30d71c832e680a718de2105370e03a70a67e. 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/NLU7E2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2d876caf9e0e3c8400a476b58c49bf81bd681743050cc66c270db1c1a89938. 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/NLU7E2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486f46758c539a14f8ebc326251af2bb112d03ba70df53042ae1bcdb470c63e. 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/NLU7E2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02d0b57665fb1f77d6d4f7b90a5979c33bf66d6660b2f578802e00c3a23e61. 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/NLU7E2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d0d6988f322396ce51f926bd086584b9cb6dbf11803bdda16b48c11facc0d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLU7E2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf6c4b9ab78716876e27c962ad7a116ceba7d4e878b319fa369c14876acba6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLU7E2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486f46758c539a14f8ebc326251af2bb112d03ba70df53042ae1bcdb470c63e. 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/NLU7E2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b09ef7fb0128fe603ba44236b631cfd2815497a670c972e233f3c71a45e19b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLW2R2029672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f3ac023fa6115eac67c3e3a8611f0e4c769a23a5d65ca275b5701bf0f81583. 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/NLW2R2029673.