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 0x1e1b133434cb1ff20110935b3f633deabc7254f99167a7f330e439705ef8a847. 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/31c4f744-48be-4dd6-a50f-7eb74c1f6c6e.json and https://artists.proofprofile.net/proofs/artist/31c4f744-48be-4dd6-a50f-7eb74c1f6c6e.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 0x642ac0b94f92147a6711be81671dd2a7f9780bd422009508c0fca1874c7bafeb. 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/QZW9M2300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21378b3ba6b72f0a802f2629f9e7b40d799921cd587000ba847a555d9301e3ad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BXWY82100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b5917bba72da6f1432ad0c7a77810ccbc742e233db0ec0f1317ba9609f1638. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BXWY82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2cb499957f1b480d64ab6f8f3b101ec0aada4b46c50bd0858f539b93639cf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXWY82100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f2fc17ef0f9fbe311c1fde6782a7eee2f312fec8772998daf9ae8248eacde6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXWY82100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee912c3c3f2e244288fb3928e3012a239ec3724651935dcd10546fbe25a285e. 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/QZHZ42074588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e265085d4e301622bc49e28aa5aa96b5029bb1b6d7fe40e57929307ffd638. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BXWY82100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07ac26d6bf63ad428c67be4094d86ac006c2c909aaeba8cdb522c7d60ed8f62. 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/BXWY82000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae601b2ac5985c86f848deac6ea1ec7476e4bff14c38dfb6107597923e65a5f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXWY82100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e47fc47725b19d9d1711ed47cd3520c60cd2e2a58b2fc084835211b6da3e90. 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/BXWY82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece4c984022c74f12f352a3a1f121d90c47e30bd9cee4377c8d9571e906a91d2. 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/BXWY82100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83817694b7c25add01b2086d24f051d70849eb9c30696c9faea2a66319f58224. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXWY82100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21378b3ba6b72f0a802f2629f9e7b40d799921cd587000ba847a555d9301e3ad. 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/BXWY82100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b5917bba72da6f1432ad0c7a77810ccbc742e233db0ec0f1317ba9609f1638. 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/BXWY82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20ecc1eee8e94087701d6b4fbea675af4f9cfb88801640f68db71293c27512. 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/BXWY82100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2cb499957f1b480d64ab6f8f3b101ec0aada4b46c50bd0858f539b93639cf. 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/BXWY82100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f2fc17ef0f9fbe311c1fde6782a7eee2f312fec8772998daf9ae8248eacde6. 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/BXWY82100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee912c3c3f2e244288fb3928e3012a239ec3724651935dcd10546fbe25a285e. 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/QZHZ42074588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe720b7e9c3294d937e557a7a76fc6b0d7bb1b7d4d25a21d9616b9b805c6b8f0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJV2467436.
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