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 0x628e5d6796334514f14cb429ed27e6b952a9f71bb2514b6bb0fafe2bb18ae81b. 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/edaaa350-dd6b-4a97-88d3-5d6044a5201e.json and https://artists.proofprofile.net/proofs/artist/edaaa350-dd6b-4a97-88d3-5d6044a5201e.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 0xc206c4b7717a1ef6b71b9244b33d31e2a3c724ead969b765d9a897b46e17a179. 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/JPB602003154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a035bd73bddfab2eaa8d5d55fb413527ee11ce5463be31088ef960e46ae0ae. 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/JP92N2371659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddb67b1f536491685159a806a7a3cea04aa72fbb58aff7702a36bad85091104. 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/JP92N2371660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e19ce8f8af62bca51765126e13dfb3960aa7e116090a40b127b5124251a38. 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/JP92N2363275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd292ba8a98d858f572d723a7c90103a238d7febf164ac2728f5a31cb347c85d. 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/JP92N2371661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1abdf416b3c6ebfab972fe8a1d74057d91fd1a2c3a6d0431765e46793ace5e1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:58:53Z), 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/TCJPI1961103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d58be04117d72738f3c68f58edd6f847c7f3845a8da26ec4854a96becb1e9. 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/JPM591001141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb082f5cf8692d3da93ebbc06722a74b7380f6381bffb90b73f92cd4a99485. 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/JPM591001144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65658b11950b2d52ea818151668c5558f48a9f6cc866e580e402a011fd2fb7b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPM591001145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed51d0a04a5cac7fec487f111d96b2e382374cf7fc604105d5f0ccce80f9c00f. 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/JPM591001149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c97b75550e206d5e64663cb384495702add8d473a7ed8fb963b8f2d251a2d9. 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/JPM591001152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157ac908e3b1df379dc25f492955ce1d890bc4301a456ae480fa8e80d73fa80. 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/JPM591001153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e19ce8f8af62bca51765126e13dfb3960aa7e116090a40b127b5124251a38. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92N2363275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838df2c1a9d83b0d8f9d1d4e4bd1681b2e8a22c935510d6dd1b7b72cc3c09faa. 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/TCJPW2306929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda4c935ebf97b5a7d8a4659cad11c65246e20439e1924dd2a6de87afdc90e7. 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/TCJPT2208375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46b34ca59518204c4545539c220f9742c40c016cd797678e96a945dfea7a343. 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/JPB602002837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c351f5f731b39046d7bff715d41197525e17567c5095b9dd46f9eb04df6f7. 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/TCJPL2092519.