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 0x025c7d82b9cb822a91dd8324b2af5df2d01488018314e3b55f005cbc6afd0921. 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/1e2bcffe-8628-46be-9377-bf6262cd70ba.json and https://artists.proofprofile.net/proofs/artist/1e2bcffe-8628-46be-9377-bf6262cd70ba.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 0x1d7ae18f73b45bb8e134f6e777e44b5f8b2eb195e3b85c8505d0d43e623be34f. 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/BXFLW1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4e085e0c7d9b155647277b5bb601533ff0b3c03611287c886b2182d056802c. 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/BXFLW1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b553fd0d775f653dad233263bae6f3235f76298ef8006100dc1419736c28a. 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/BXFLW1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9967b3443daa5ffe3a0a28cea411ad5d10889cf804b9c6b10081c8c45c54ace2. 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/BXFLW1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653256b5b1d34fbcf0b964e684bed65503a5581ae71b956bf64d4c633f838603. 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/BXFLW1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5785c98b8ed10c9dfb860960db05d33bae2ed28b2c16c19a3bcd956e98b3904. 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/BXFLW1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b5087dc68497693c9bd772e271223a485df1eeafde19081764a124d16e51d3. 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/BXFLW1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3aedec4301a67eab789cdc4916f01a0862c4ba0bb0a5d8af394496cab63798. 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/BXFLW1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13df4124026393d2b2e491a7502e41ff7f5549c86425f0dba31aa2343f0aae1. 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/BXFLW1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45f7322237e9919c8dc191fdba4458ce05f9de4ad18e606a2016006a014b192. 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/BXFLW1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6102a653a5ee494854a22bb9a36c9de373257cc4ffa3ac274d54dd7a6ffe22d. 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/BXFLW1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522bcb5a318aa6be90f06336e27c47617abe57c9367a627bde7c12acf3e07c9c. 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/BXFLW1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04bc1dc861d4d04d3491289c11a34e9c6506d8341aa5c6ac5eede68d260da35. 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/BXFLW1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09a34b73bba618cf2e7edff0134d346fd717802085a704ca054486fa44ad73. 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/BXFLW1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3589f338fed6fac6cbc499d1c1998a0fba144b233d96aeaab06ee43f97b12c9. 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/BXFLW1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe517e1342beae4a195b5e8ac37eda63df64f1e871b464d144a0b5fced47d98a7. 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/BXFLW1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4c3259e42e34e6a236107b6a2842f2d43a6748c1a31e452f55cc67bf498391. 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/BXFLW1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a48f6b8a8b8faa68b5f9cf2c79a76560b20645ba5f91556eba8fe0885d5d6a9. 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/BXFLW1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279fd1b25c65337b3ab2c672eeb4456d99f975d144cbee9f503f1f289c8ba01. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BXFLW1600006.
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 0x3e61436da7dc54dfdb8bf6ecbb06f70726d1f5ff0588d28bcc9160cff54a560a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXFLW1600019.