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 0x9d03fc31d1e12857302b731c9fabb577fff0741c84e24a5c2dc36994c538edd7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b7f9879-6b18-4d92-8f0e-c45d0f59eeb9.json and https://artists.proofprofile.net/proofs/artist/7b7f9879-6b18-4d92-8f0e-c45d0f59eeb9.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 0xaf450504232037d3dc0d4d75293f4c4c2d20f03d76398bf39727344841903176. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USIM50811019.
Credit, Criminals and Price of Gas Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38cc082b4427385bec28cb10ef36313a5d30602a54b4a5d764c796735d4940. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USIM50811020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d5f86a31b8769b70349ccfc6e4f1b80538c6e468bd3af37005f211bce9b98. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USIM50811024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eb254621661d2d1b723ba264d5498f03a34f1e789b3b3e6754106e83fe8716. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USGEK1700330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c96c037fe83a7348ee8c6f8e1b4fb79486d359db2020438b08c3e5060dc1383. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USGEK1700331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0118c0a85ccfed32c0b95e961d798973947ec497a964a8bda8ca39e72a0323. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USGEK1700332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce30b4f79c258f7013f52d4bbbbb0a61541d732dd05663adb4872a8e16664d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USGEK1700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d341b8819fc93bee6e834feb2e17782ba64986e05a5de41ee703affb416b3c6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USGEK1700337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a7631dafa9ea64934a2ffc6e52e90e1881cde29785538058d8b7905da976a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USGEK1700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2529bee0224ec8b71723a41d3289b96f64a32696f05180af2c0c3210308f3cd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USGEK1700341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4c1e8361894b93c4d46b3dffff49f2ea82c4418f7ff4e7bb58ead33162350. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USGEK1800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3ee25aaf93613bdb591cbead257cbb180ec13cdf706a41819fbb16b6c0c16. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USGEK2200551.