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 0xe03d97f388c29709adf14240d5b2e66a0f389ac4dc6cd79e4ad7722d0813ae05. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e326c469-8a42-4d6c-91f7-eab97f0afddd.json and https://artists.proofprofile.net/proofs/artist/e326c469-8a42-4d6c-91f7-eab97f0afddd.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 0xe26021ed2e54f407083fc4531f4d45869ca5431a45ae52a01a296be32831a1aa. 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/NOHVY2409001.
Berta Kreken, hamborgar etter Nils Ormberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898893aee3dde6244bf78ab1703ccf10a7797e49d4a3f891dd6ad42eaf82913a. 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/NOHVY2409002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ffde667bffd8571c2079cc93d29693cb787047b74506a8fee9c0bc505245a. 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/NOHVY2409003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213c313720d60df537e05f838e79ec0a89184302ddf908871955e2cfc787c62. 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/NOHVY2409004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2551ad79826a8dfa27b600bb5936f7627ed26003dd02e3cb9a0991d1612dad2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOHVY2409005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd79dbad8a63bb07437a57603b7eeb27c9c7e685cca58477b37db51e21beadb. 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/NOHVY2409006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87816ad62619ce6765e6f2ca06b1e486d91d964c46e4ba283a4d40e5fd795af0. 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/NOHVY2409007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94e04db0086ba0e9701933b85d359045e9fdda68b8da972b33dd99d5486baea. 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/NOHVY2409008.
Ei sveisen jente, reinlendar av Sjur Hesjevoll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06ab4231d5dd7d2e6352fa95bbf704719ac7af0659ef964f5bb63e30222ec8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NOHVY2409009.
Besta og besten på loftet, hamborgar etter Johanna Ormberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a3a62e62804223fc7efce5cf75f8369d7b016f56fa9e21965fe83e43ef523. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOHVY2409010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f11bc957f533948d52b1346aec941ed7c210af24a0e6f0d6a489e7ca4de468. 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/NOHVY2409011.
Crazyfuntime, reinlendar etter Sjur Hesjevoll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a2d5286be6ba19ad98ae333905da5063a4c86fdc0c4cd1a5c8635580d47a2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOHVY2409012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560f364de7779a094124a34e353d955643acd75c542286c2da598645820ccffd. 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/NOHVY2409014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ec3fd1a15efb49a2b5747349c0a5960c55ea5995b50758afc9a14e63bc0bc. 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/NOHVY2409015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e10d8a59e1e3881dddc54e514a76a556039b46d77ea77c3f78f5439cb32b85. 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/NOHVY2409016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898893aee3dde6244bf78ab1703ccf10a7797e49d4a3f891dd6ad42eaf82913a. 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/NOHVY2409002.