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 0x25cecd8f417aab44a0438ad8ea0c6ff919a2ed6d270ad374454128beb1866aaf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1ebbd6-6e3c-4899-bf31-7765dcf662f1.json and https://artists.proofprofile.net/proofs/artist/ef1ebbd6-6e3c-4899-bf31-7765dcf662f1.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 0xad323bbc2531398af48a53a1bbe5f65216aea249a1e822cb399c46967594a761. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AUHS01204830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa4b8980e588e6cc0fd1bc024200d8e2c80682512ffd6c9aa2418fdb9c9e4c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUHS01204831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e98ccc777ec62ce2d79f861f09eb002c58567df04a8f28af3e42051d506f0d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUHS01204832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5334b9c15ef59a00ad1a311b9a0a91ce020405d4c101466636f402120aa58d33. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/AUHS01204833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a4bb112e6d8ecbdc6c774ba5770f18a35b259a6e97d67ce6f4ad8a4387f023. 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/AUHS01204837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a9408187bb4622fd7e42cceecfaa1a33c62a2343298facbf304d826a9ebc3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUHS01204838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a20f7aa86476443a6a97d54810dadfc11ae75eb78c95f43f4552c5cc4356c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/AUHS01204829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67af3311ec769ae93485ca1496bbd97ce56a254aad8d6b3dfb7c8f4a1a632ff5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUHS01406715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5d0f62a3b92252592b80ac510c55d9efca2fd31e28e88865024e908f3c7988. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/AUHS01406716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611612ba51560dcc0e0501a55097aa89429aa2bc77257a6ec3106958e775ffc2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUHS01406717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1588a7f1d3ca17165d237d13293e4a126939ed481cd27c1a729ae8df4e88f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUHS01608329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec28956630273271f3896784cf91b57e18ae1a412a8da508ae455d4b3d1d0d88. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUHS01912300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbec4915b78bb167b9efa29add48e409c9579feaa93e09e3cde300826a7dde8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/AUHS01912302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220bbb1d9e5d6700d268cb79c104410913f14c63b940ef15a3aa3e4e6fc8af10. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUHS01912303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec43c67395b6f40b49466a1d28858cfe119c7dce26c3e7df6655560867c705e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/AUHS01912304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda917e0f336f3569fe27c88dfb49a912872fe2b3e6c27b0f5accb22aba919b. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/AUHS01912305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734df5f254e9bb7dd1139244557d9e5bcfe789197af9ea1d7b05f999d5637547. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AUHS01912306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a0099e359bb0f5d0bcb6e92805b5397de683c8d7c531666c9ee57687245049. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUHS01912309.
Ska Också Jag (Sjunga Om Igen I Evighet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde563762ba94d1b9da73e2ff6c0dee64366018f577530b2970c9ac8c369fc9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUHS01912310.