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 0xe317a76837817328111122ace49b47448dcdf609acde1e68e22837228d1d0990. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0295d096-e0c3-4eae-a605-959e752ad994.json and https://artists.proofprofile.net/proofs/artist/0295d096-e0c3-4eae-a605-959e752ad994.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 0xcfa58860f43639842d0f15f78b5bbd1c1806477aa6106bc3644c568af448661e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SE6FC2416270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cb898a108ddcd87cdcadcb27039212e454ddf17ed38664bb9586e48b3b1959. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6FC2416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5053b0a666e599f297335c0420d051870f2fc612f2c3a72e0e4d2583312b9. 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/SE6FC2416272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d800493d555530a069ee01408410e2f58152eaae6f3429dca721391bbd1b66. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE6FC2416273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70d10871c08f3c400bbae73bed85bbdca211322d3beb471d0a19fee314e1212. 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/SE6FC2416275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62da586c00690c08f346b654a9a2dd82ca671524e80bc5d2c909d714a38973f5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZMEP2333656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c959b910b7867885d545409876771a36a035a59d70a21cc2755ee36455cf4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEP2333657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d23abdd3cdaa412201578b0af8f93035a74f53d720af7655b32d927317dc1. 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/QZHN82311289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b454bb853fd16f48f1b5a1e5dffa9db35f89e8a79b619e3acd30aacd5dc3ac6. 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/QZMEP2333658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3107a42f383355a117b333e7a2e07491038afd745edb2270c981537f3922b1. 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/QZMEP2333659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4746e15de02021f88121c404af39aae7ca8a2aef2f7d107f3a2ada39ce8d23. 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/QZMEP2333660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd8b3f0800c0c0352e93bc327cb01b1d0b737522494c3e35ce9a6958f1fb564. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZMEP2333662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9199e123e76341d7e799bb709785374b77772cb33fd681e5bce186b2440d4697. 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/QZMEP2333663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d7f57c760390f09984670df6ac8758e2342773fa2520659245e1707f6b620. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFYX2030597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a4dca62546dd91bbd325a3b251bae218398f428775458ec359ec262ee408fd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZFYX2030598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb264062b56b2c402a1cef8b21f45ae76394ae7d2b2d6aa00ad9b115c79371efc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYX2030600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d23abdd3cdaa412201578b0af8f93035a74f53d720af7655b32d927317dc1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN82311289.
The Congregation - Jazz Alliance International
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537c85dff04fa7973ab346dfca2c071b681de69d2b81cc2fff69a04700475e63. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITH752300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4446febcd84ff768b7ddaffe945fa11b4ea518a16ccd7681493aae7eaa420e18. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITH752300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15b5b07ed51fade0189f5f134636274a89c5de89c078673f3f15f633c1600c7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DELO20911666.