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 0x9b452f642962b3a33b5bfa5d047dc086e613c975ccaaa781b26e924b4a7a0352. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32a582a3-5516-4eed-9b13-e6e18eca2b97.json and https://artists.proofprofile.net/proofs/artist/32a582a3-5516-4eed-9b13-e6e18eca2b97.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 0x5f4b945b435901f87a2e64d264c7d4e15d22448d31d3529142735c339b40102a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOFGG1965100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62545e89b06c5ba9a6b08fc931996c4f466ad5e05257d0ea2c09b70713e483f. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NOUM71201035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff889d4daa88dd183a024f51035909139540b1da75400a66ca5fa822909fc00e. 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/NOAMM0300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62277d6ab247c989a85fd288cb5c2b6f9b6f6d6aded178437ddce53031c09efe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOUM71201037.
Skaff meg en synder - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfa6905e30281462710a04a999c71791da919309d55054a7a3474422655f0a. 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/NOAFC1100173.
Avskedssång till finnmarksskalden Broder Joachim - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80637a475a0a41b5587c1e9058cde424c4a39a0beacb03011efa10581dfcaca4. 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/NOAFC1100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea74bd1e01b1838ea70650cb740e53df8d1462a3bd8ad9bb58ef6c62398d9f7. 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/NOUM72000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107392328a02749fafccaa6f24a50e5866fd27a7f9e5699f7423d7d4eb42f42. 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/NOUM72000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351cfa356273df4e517eca125557107eb0ed7333babc391fef3c869fc9ac5fa9. 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/NOAGJ1727010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf150aab4348bd5673fac5b58b99f88ba5492fd6e3c8da106325cd47a70005c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOUM71600950.
Crescendo i Gågata - En hyllest til Lillebjørn Nilsen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475451d4aeaea3afbe27af5ac8ea898b2900143f3fce2c9033e057f0e0136e9c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOFGG2040010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b24c6ce42b02d8c3dd364c0ff5d5ba5b5427813e43cfc58511c55d0cc88d32. 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/NOFGG2040040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8c238c6d80882be6944a156f705e9a42938e2be0a4aa6a8a78835d32743bb. 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/NOFGG2040080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b4c209e8b753a1f494cbd65b8c28ab728cb9fc265506d86a03dc69e733bbf. 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/NOFGG2040070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b945b435901f87a2e64d264c7d4e15d22448d31d3529142735c339b40102a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NOFGG1965100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d05d8fda71a3ebe76c1d7c75ee3cbaede981c8aa324261711c50c7ba5d9a3. 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/NOEIA2026010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18d3687e268da9438f611bc16ba7126185fb510c30c459acee9d5b6fd31cf9e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOEIA2026020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beb2d3834968c735a5575587700110d3b41cad8dfefbaf159e3208c22a216a2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOEIA2026030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba496ea4f00b38dcef31dd646b0fd74650662fb9d6c58d83c8154a60b829b0. 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/NOEIA2026040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ae25fd8277cda249244dbffd4aef979577cac1c85c17bcab4cea49716c002. 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/NOEIA2026050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94bc5e722464c72668e78e98f7745dd08f7a62830abc701e47cf4117fe1d4f0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEUZ21600103.