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 0x37441d2b1562ee4ee4b2e94233eb451f9892e59764c84fdde15e1f6ed1ebdb51. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e4a2904-fdb2-4dcb-aa84-16360c806b1e.json and https://artists.proofprofile.net/proofs/artist/4e4a2904-fdb2-4dcb-aa84-16360c806b1e.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 0x06fd6af8b778d614f1c754f8a2964d493b11cba700afc5c021ee0242dea9ffa1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIG2473251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70346ce4afdee59f822b994a1717f5532f8af5434de8a33569f25cd324af2790. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAIG2473268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02519ab45eee0017f448a8594f9276fb8eeac7758ae2a503dbbc176784ec11fe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIG2473236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf3431e21049bed3fcec116bf0e2254f58fd4cd2f618cb60e1e1123d840e3d0. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIG2473264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd01d6a007a253aa71a3f4cc42e2bcc34cf5d9135bf613bb64af6df74f3877. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIG2473245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaccd8ba9213511e8ed08ff90acb6dfe9f8b4cb47d99f0396c34fa540238bc3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIH2473255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1152930522c7ec78a67f8d9d2484fb026abadec0143834cc60bb85b226313. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIG2473261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a822e02727ca48b09e8ddd8bdb96a24aa2f263486f599b86a5389b1cb8f5b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIG2473284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7318858c0c2f58d490ec32c851c34417fc36f3e85515dd41f63a84a06f0ecf2e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QT45S2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8070955867442db2d4ce2f82a26fee4fe695e905d6c42bfd89000406f5930e9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QT45S2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d89e6d5af45010289ce8f1a20a67b98376314a8ea61ab63f6a6c21c79d144f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT45S2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df104b3ff8c0761bf2b0e1c677b65bb69c87f80840eb8e8c47e767f7c7ec6ac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT45S2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931af4aa00579d02abec40eb48fa3e9c83b323f76cb55dae46db61fc5b77fc6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QT45S2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb733a6eef76ff7d9898cffdd89f4dfbab5717e1deb48ddcbf7efb8f643d19f6a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QT45S2500043.
Super Sleepy Songs, Vol. 1 (Instrumental)