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 0x3a021aadeec8844a803c3df40e17de4f36a661ffa0e38515d063c5f58a80180d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dd32543-def4-4405-a532-433493b799c7.json and https://artists.proofprofile.net/proofs/artist/8dd32543-def4-4405-a532-433493b799c7.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 0xfc9000baea95aa941aeb8936b7e9086e9526fe1199af9384d4d847b6cba3edd5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE3SA1504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6030181827f577ae781c6e6cab873bf1a51c562c3cf369c29ef19c5debdf1. 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/SEYOK2028939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699b12ad0aa6c5ea19177b5792dd186156c043932207d6a3999bbc55c2975302. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK2028940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcad78fc6943cefb5a96c45cf3040ea8c0daaa3f8e34633a6ed313214a035cb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEYOK2028941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c097a65194fec178425bc20c74134d3085963f839c1fb9a54a74dc3a80e650. 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/NO34Z1503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac78f4dfcfcd9b44dfbd2a3c84b45bce9a47599689ffb636b011d57e38e47382. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/NO34Z1503020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abdfdb245c0f77704c1d69a5b8fc3407427c4f534e2be9e4b928e693e4df91. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NO34Z1503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a30ffde78ccc2b7a1d7eeb5829520181c364281417b08290c28a35b1c322c7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NO34Z1503040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e17aa4919119ba9dbb8262c4f932b179607eaa3a12c7a532ac04a8ee50a31. 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/NO34Z1503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63e07d04f704b1c1eff080769c35612da214e6faccfb633cb9d86a7dc415a46. 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/NO34Z1503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2af407d5fc87dd78f22513e176a7d83249e8e40753887f9168b7575b1df155. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NO34Z1503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1987e08462213cc51e8fe9babf3acbf698ee11a8ef42d407a8ee9451f5a91c9. 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/NO34Z1503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ec1f7c438993afabea4988d7dc2088bbc8715f1dedb9e6e082549b9ac08deb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NO34Z1503090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5595494626d3fe756f69b707824cf55faad82e3c695d0d779c4d0eea46403139. 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/NO34Z1503100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1463f5a64adffc30d661f53da3affa0173ff1b515b53a3b9ecf31f333e0fbb11. 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/NO34Z1503110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa311e59afc1f3b17c06200f0c83fc48eca0d00d1a93fc40c1690c8075448c476. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM81526541.
Lapp-Nilspolska efter P. Karlsson Viksten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a65d47ffc6dcc511ff3241f871864642639fff0115d374824c1bd8535aed6a. 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/USHM81526542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022a4daa1ad55cbdfd32a9fbdf614fce6e674bf04769723fa34927ca1a438dec. 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/USHM81526543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3314a425319ca8577d5e8c768b7e4fc1c3cf0ad8c14d60326adc5a70b707672. 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/USHM81526544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2105de8988179976b78312996de415e37e3a92940753559c7f26f29730687fda. 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/USHM81526546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931073503b18e8d7a1ba8cf33a0ad94d5079f1af2ddb3c19ea680db303b16f25. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM81526548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b3e091f98a85ab48a051786d1f1578285af880d5bdadbd56a3cb9490b4b9ac. 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/USHM81526551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c7edfb53d4766d79a85d7da53ffe07e0054677b3ec66e1c7e7e0e5d97dfd4f. 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/USHM81526555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fb3206666d7883b000e87fc75d6d55b4f92250b114aabe4eed50d6c16e541. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM81526557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b91a94ce66536886195e9758ff21b47505d7387ddc3a89a6eb9df100515ff. 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/FR05G1511012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d39e4ecd1f9fea17e722bb58a287dc3047fa6e79ab3cde7524023f65bd44cc. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/SEBFO9015040.
Käringleiken (feat. Peter Roos & Ingvar Forsberg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a966fa3af29d19e5b9f59b78c83420bb6668422a46196b77e7a77dd2e944da. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USCGH1995232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b4dc92de69acea8de4f75607023391060d65aff4f05f855ffa57449a61952. 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/USCGH1911974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cb482409aec434a67301aca9d71b4ca4ee71b11ce276f590110a5fdb4c1097. 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/SELIA9300705.