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 0x7d0984049d26e4dd848e44f70ec396ef21822cd2377dece41bb2b77bab527b11. 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/7b1dbd37-47e3-4766-ac78-85116432e233.json and https://artists.proofprofile.net/proofs/artist/7b1dbd37-47e3-4766-ac78-85116432e233.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 0x84a936cf7e5bae58382053d154073be646695764ae11ba8c483c58a37926645c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281991429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d459047e7f55a6ac7c2d24de11e951a67a4956574177d8ffcc6c43b53c7701. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEBAA1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e50a7d82f3c8ac32868d83eb06cce606d5d3a6ed562f8e41b45d8b17b5dfe6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEBAA1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c9a3f0bcefd0bb9e864127e1a4647d85fbfa0636fcaa5b34327956250ed13. 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/SEBAA1903101.
Sketches From Tröstrapporter (Music For Theatre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55061aa47525a298707310679be88d6e6012b72fb305e316ec4c84dc16d8d1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SEUM72000543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93faa40cb0d29a4235a39e4d6a39655b153403779770ef40540b62050cca1ceb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEA892400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f9c8be919c50dc9b8ca7b4c21defdf6752fba69dd8313219b287cdbab7839. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA892400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793f0b1073a726cb57d5a6f4fe999e128c42926e965278a4a1fea6e658ecf6c2. 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/DEA892400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f3a36b01cd8cb95210953f969f80166c99890757399335744589d4ec55485. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEA892400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4af5a1a3aa696b1a74e668d549f4c523a262f20d7093a132c67559c18dd60b4. 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/DEA892400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f55bf65b9e285c4ed563d29b3701445f8acd700369fe252e077dbb21ac69b17. 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/DEA892400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399a03b9a573bf49a70b569a2ff10c79d9779ea08e5bd38b90c62c5322d1c21e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEA892400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5251fbad81bdb16a92623f24ca0a3884aa287be9b095c59c59f2ea8ba31ed6c9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DEA892400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdac41f680303fd29a6cc5eb236ccd85d4f3930ebada90b29491140bb3b64c7. 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/DEA892200349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd09c3c018c1b357601f4d295c04f30dd0aff63f4c5718481729f014070436. 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/DEA892200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb2e67bea35becefdfe53fc0c680d7f73c394d7045966934026fae8f499d863. 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/DEA892400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c524ba7078958af5132bd763ceeb086f8e22a8c6f1f9bb55f757f5d5e68a377. 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/DEA892400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e418f5f6f0bdbcc8f1835baac5878a694bed82ae14cc84aeb50ee4b18363f6. 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/DEA892400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f3174d234e054848bcdc4ad701415b8ed8449b789c420926f996552a574d91. 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/DEA892400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953d26ef273247c3fa5edc756736210b39eb3e0e83f98178d04914df3f5cb793. 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/DEA892400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31966fcd4d519ff3a429c070d03c314be94d4abbf5a08656ca4f6560933420c. 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/DEA892400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e558df99497cb2fcdbcafa8e152e4507455e9e1e3ab813a679cd7bb3a2dbbd4. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEA892400551.