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 0xb0e0e77779ffaa1a2e6072d8a79ab9c31310cb2384e481af1afa7695238c3a12. 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/2027d409-6fd5-4012-a297-04343d7d86c1.json and https://artists.proofprofile.net/proofs/artist/2027d409-6fd5-4012-a297-04343d7d86c1.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 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 0x606f0b9c70250f05a092b6683f5fb52ed2f5ac1cc697a317a4d9fcdfddd559d5. 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/BCOXH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545126bd1918548b4cdef72294ee5ae6dcfc29d0ba678e51fa9b1246cc5da38d. 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/BCOXH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e839f34167ee906337482143c5f608e22d1340290c47b21c8ec27d1a57e0a. 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/BC4MX2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710206f06870d12e5f49bd6725253659236c386ead0781a9ef1c944e82e3d089. 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/BC4MX2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccc0c904a4772c835f78f5b06d5950a5e78d80d4eb9922d6f979555b3b5f650. 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/BC4MX2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f55b58fcff348c872713f16a5366293e30953297937fe48e63b77020f44e980. 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/BC4MX2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f0b7fdcb3dd2c4211b7894cc648fdbde978b5c1603e2e0ae49b1858262c8a. 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/BC4MX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22d9287ee88f672833904e1137ea98989ff550b280d4fe57d30d2247c17e442. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BC4MX2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55009de11621f795081e6a5c5c6a0734f5bec238322c6b40a6db3eea1b5e15b8. 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/BC4MX2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e6a5b02b84467b46c2702f11528af454715372254a6049f01950bc31229c6c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCOXH2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3c623023e2deb81f9a55c657bec41a09fcf65ca38f626e2f597d05be77f8b. 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/BCVUY2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01192f9286c8acebf4ea32450d2093d839ab4fc303366d33bd54314fb655e663. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXIV82041495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eb04db0613272ee8d3230bf12a45734ca17ac698e53a47ed126a7cd49d03e8. 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/BXIV82028825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9956b4915b08f03893249ec3eeb221bb0b10b4dda5f8407b66f6538c5c5d290c. 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/BXIV82039589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2418d9fece1d2244a201ba5703c0f365157cd4d7b6325b625dc84fd8c3b51d4. 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/BXIV82035934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f557ba323f95992590c1ec425902f83f4036433d2eab4b5dd9858411c2e69a8. 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/BXIV82016542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff24ed78d08fd89eaa0944af2e3710584d7d306c05cec19f79974aed419f94d8. 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/BXIV82167655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de2427bc785aa253fbdf2168c720610168895e85e4621097fe3dc8a67787a88. 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/BXIV82107088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099eb4da7cb85dde424c92319e0a1a2386c087ec659f65350e5bdcc43ab725ff. 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/BXIV82124732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96312ebd13e83bfcc69f8a4bf3cd4cd838c1f74ce0989ccee041f289ff11a28f. 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/BXIV82192737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb09fa54faa78a47cbf20624bad847bbef5bd512b8c29c504d0531acb4dad79. 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/BXIV82129236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a3d688b7b58280b9105e320348a41ffbc99bc196c8b7f380f32bddaafaaaff. 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/BXIV82167031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ff537c0823f04469a29fc28489bcb12ea6c20312646787aee48cea2c5d55a. 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/BXIV82170294.