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 0x983899c26faf0f627e802a66b275cbef90c843b62a6c14cd4b1e1d0ec0c078c1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c163148e-e4c8-4ebd-bf96-c39e57e62eeb.json and https://artists.proofprofile.net/proofs/artist/c163148e-e4c8-4ebd-bf96-c39e57e62eeb.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 0xd82dea9c4f9c74f581ad0928a2dfb598222eb2711a4f8f3ec46e2eecf8af08cd. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CH6541928506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09bef04aadad17728ffe68382b1e5e31d52c195aedbdcda4dde1632aab46ab. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12108470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc2a466c68913802890b98e74c2daef3172c33b4f4d998265469ef7c30a0b6e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12108474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b430a6db88b31f552ef1e41bee953ab66b329f71a038c6f811a68772c2aca6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12108476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db8bf266a2a8d6a787916f0d1fb118f1af4d4d9af6c6dc73f06d8728e1b612. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:10Z), 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/FR9W12108477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31492c1983dfe99583c138a9c8520e1ffe94b6f3d6d3ee423d73844a089ebe7a. 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/FR9W12108479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bdfe1ac090aed12506dbccdf4ded9eddc392603d55a2bd6ba50134858f2801. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR9W12108469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09bef04aadad17728ffe68382b1e5e31d52c195aedbdcda4dde1632aab46ab. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:22Z), 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/FR9W12108470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bc2186b2112675408f61da160c8d36e354ff9a8858677e35b65982b4a420c4. 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/FR9W12108472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc2a466c68913802890b98e74c2daef3172c33b4f4d998265469ef7c30a0b6e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FR9W12108474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d5d9cd7dac08928400cdb1c97ac69dd42a5665786d4982f024be678bd9b15. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12108475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b430a6db88b31f552ef1e41bee953ab66b329f71a038c6f811a68772c2aca6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12108476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db8bf266a2a8d6a787916f0d1fb118f1af4d4d9af6c6dc73f06d8728e1b612. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:57Z), 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/FR9W12108477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4525977c07c37cfc8346cf0158d76a108732ec2dd61f446623958f7de5c0751. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:35Z), 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/FR9W12108478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31492c1983dfe99583c138a9c8520e1ffe94b6f3d6d3ee423d73844a089ebe7a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR9W12108479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b9b35a548d4479585665078da9031a9a54390a1b41dd8cea49528069d6ddad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXQ022502684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392bfb2518cf6769b505fc038c2faa14a98991c88745860b81871a68e1c7fdc2. 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/FR5R00911553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96924ea7257c323a66d9adf87bc4b7464334aa21c8c73dd8d517df07ca59312. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAIC2402762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5780438e0658fae57cf5991715733d849fb52f31dd78a541ad1f9e6b9816be3c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH6542205974.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d65594a177e9cd389c412d13330c60bb7e1f8a15f16a5a99e53136b83d755a8. 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/FR5R02314025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3447e2577ecd8afdb16c0742fbc4496d520f0423aec7c1c9d2633b9e4ecc75. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CH6542275040.