thumb|The Kingdom of Saul, according to the biblical account thumb|300px|David and Saul, by Julius Kronberg, 1885 thumb|upright=1.13|David Plays the Harp for Saul, by Rembrandt van Rijn, c. 1650 thumb
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 0xb44324b2539383267456712abfc8d60e9d63cdd241004f557c6acef30a83b40a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/035f8f19-f2d0-4d90-aca3-4660ad16438d.json and https://artists.proofprofile.net/proofs/artist/035f8f19-f2d0-4d90-aca3-4660ad16438d.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 0x60e82b728e10362bf405d7f22f019c9d3ad2daf84507bafe19768058e585d935. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEG931911146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193c6e889fb2ed9375860904a97671967514c2baad0e626e57210684e5628701. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEG931911148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7af7d4531d79de8f8605537f2cf338a7b9d317aa9c2c6b05012594f016b37f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DEG931911149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748507c344a17baa9c9680dffce44baf1faa741c56f076ffa56b6f2853ff2ed2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEG931911150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd0a70cdf0863ba8b7ec961bb904c92b987a07008f96c400d15a8b12cf1b17. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEG931912939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcdf14a552b7aed246c955c51e1e8b86ed790bf68e196c48f7446de0199dcfb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEG932200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc969f6e91420d9174bbd3c69e7ae6cdada9ddd56dd7fcfcadbac256418834. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEG932200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee5ec94cbb75138b1ff19352d43696bb4391dd48d22249654d926c7065af645. 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/DEG932003990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6422aa0cc0d87991dc82d9ed3f3aa79ec84941d202796b9260d5454eb4d02a04. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEG932200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee5ec94cbb75138b1ff19352d43696bb4391dd48d22249654d926c7065af645. 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/DEG932003990.
10 Years of Rhythm Section International
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8817f4fd3057ec2dbbf538df8e18796055f509ffc1aba43b46071f8a0d7a63. 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/DEG932404231.