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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e77a6587c46b41acdba5bb3731d338e9210155d6e30762d3906ab3afca89655. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601a7922-2cf7-45ab-8fb9-a93bc7cb1815.json and https://artists.proofprofile.net/proofs/artist/601a7922-2cf7-45ab-8fb9-a93bc7cb1815.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Göteborgs Domkyrkas Goss- och Flickkörer
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf93cc9e0ae0572f9a175ba458dc572892f26fc10b0097e111227b8dd336fab. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBLPF6764426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1853adef3054b1cfd4d4097a3a19298546e0abb7f2d6bafa056f1f38e8edcf6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6764433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f26bd4528a02b41fc23c5c6d6d6b320cc6441302f2784b34df8b812fff104c. 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/SEVPA0601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feb457a57d44dfb23dc468db8ba2c6dfe3eaa94df179ded8d7f79cc64acb1ef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVPA0601213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d92073d47a004a7b3da4f40173b97c7910c1869710829437258f61d2f89375a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA370580135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff634bfb84eff3d999408fe5ffea4c55b5bdfbf14d5794d209419968d64e1e. 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/USA370580143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ad2ff6968f4b54fa8aa98a85ab36b03c09c09c4b44084bf44a86d4a38d3158. 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/NOKSA5801100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693fdfadbc2d36ebe4d1ee34d8f2e4f7086acbcd5842fe80aa2d643fb3245de8. 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/SEBBA9605020.
God jul! - Traditionell julmusik och dans kring granen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9a956716050fb3a946c8fb086bfa997bce0d41aa7591a7fc39254d98d61ade. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA7342080.
Nu tändas tusen juleljus - 2002 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6d993170878209f1a6419dbd473f06e21baf99eebe9bac362643823c9ca022. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA1201294.
Nu har vi ljus här i vårt hus - 2002 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4471365e84e80dd5eead23579c3559a543f2d3b2064b85aff01d27034541b89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMT7200443.
Kring julgranen - 2002 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a1275c3c1eb5d36e4a251fb535b4bd40f4871cce4055c3f346cc3d6bb83905. 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/SEAMT7200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed85a43e1731594649e433e9c7ffeec47059c4e0345ecd0585d11fe8fa332a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMD7300448.
Hej tomtegubbar - 2002 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3d2918c9b569b3d8710fe4bb53e644e9d0de32b1576eac1a5e4d89b683b66f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMD7300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf25e839d6358b56487f29064f36c5bbb12e8d17c5c8326b1a56722478a980. 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/SERFA9802170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87bcf29e359b08228b4dfbebcf71b7920c94662cf8d686575e49d7a1ff8043. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SERFA9802230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c79f9afbfe58a477eed2dd07e59aaf4f29125520d06e133188bfe086abb338. 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/SERFA9802240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c418626d0cff45d79e1cd532a588b77ebb0778338fa5fc285e0902fde5d29a. 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/SERFA9802380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cebdda2c799673eb088eefebefc1046707da414381af4fd157c9072da5b5b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SERFA9802300.
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 0x4f1e09fa87c96204fbe555da14e14f571dfffc505502ddf4fd4638c0ec484ed3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SERFA9802310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aa4352ddec084b2e4c2f228b59de693419e6ca709fdb0f8d3ab2a0a87e236b. 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/SERFA9802370.
Mädchenchor Wernigerode: As long as I have Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed1f8990ce81f6aacd75c49d19ee4bab77fe5e3fc5b5ca9af144029798c5727. 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/DEN422413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3e7f0657318a357aabd11e16feb4253503e239bff3b5760df065ebf774cf6f. 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/DEN422413009.
2012 Texas Music Educators Association (TMEA): Erwin G. and Elisabeth Pink Elementary School Honor Choir
Sacred Music Vol. 1 (From Virgo Lauretana International Festival - Live Recording)