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 0x32a67e400bfdb7590b65478d7be8fe36787ab14e4bce5b6416cceb215f0a1fca. 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/80899339-def2-415f-9b56-207d020878f0.json and https://artists.proofprofile.net/proofs/artist/80899339-def2-415f-9b56-207d020878f0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9583a7c878f301e7d124cfff11147592260cbb83711d914350685cc0f0eb457d. 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/SEBAA0700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c16222bffb772a158efe16cf02323835c97359065ba02980e558f26227117. 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/SEBAA0700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c27570f152fe8781fec96d0f2e15b35a0659ebe0174c9bcd61a58b1688a1dc. 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/SEBAA0700304.
Giv mig ej glans: Christmas Songs Op. 1: No. 4. Giv mig ej glans ej guld ej prakt Julvisa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538eabdc8c42ee12eabc8b0b0daf1c35a004e2b00cfde676f5fdcf95b2f0ebb. 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/SEBAA0700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f339bd78f5f3fc44d113ed7382e0c4684b1305714774b937e91ed5fea343de. 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/SEBAA0700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc41549261d213ec29702ecae7fa497c0532deaece4d38875e51636171685ee. 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/SEBAA0700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f77f3caa139e2f7c28b691ff79bc06254fc093cd8030722eab427c9334a46a6. 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/SEBAA0700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0502d1001dde1e86a306a843f6fe811fce03fbd31a6ce3ecbb4ac60ba7fdb81. 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/SEBAA0700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa201be5b0bd0f9abdece06b75d9bf4916fdf5e6a40fabf734e93a89ab5fcab85. 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/SEBAA0700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189b40e888da4fd1e57519784160bb2076ef11b38b068bb08d4dfee26cab5007. 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/SEBAA0700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ae54d896d9a9afa8c3ca5d2883dc6dfe642c5934efcfdd2f8df739a3d8a01. 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/SEBAA0700313.
O Helga natt (Cantique de Noel) (arr. J.A. Hillerud for baritone children's choir and piano): Cantique de Noel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01e5ebe470b12e0ed64e071c82143228e982e67e727fcf2bf58509669bbb6c9. 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/SEBAA0700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39065c02874a70abe23bcd480fa0c2b1a892d252fcbc35717fd639d463db5aa2. 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/SEBAA0700315.
A Ceremony of Carols Op. 28: Procession
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14378d4c3000f6c9cc8da5479aea2c6eeb23598e71c8c8008a8db3feedf1ec51. 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/SEBAA0700316.
A Ceremony of Carols Op. 28: Wolcum yole!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c0ad8ad9d36ebb2d80cee48eb33254a288f746a4e49ddbd39b20a7a853b816. 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/SEBAA0700317.
A Ceremony of Carols Op. 28: There is no rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a9128171fe3b28967920d4f6d3f27a684d2dec412f5cb4b03c6bb8e1b87d9. 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/SEBAA0700318.
A Ceremony of Carols Op. 28: That yonge child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517420e0caf5724fd5a286de7b9ed7b7c4b9a581fe910d2cd72cf3a6f5ae7ba1. 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/SEBAA0700319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b1b58c98c34b46eb9d995fcf2c36bc79b8013692c6a79758b5e5b85f4384f. 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/SEBAA0700320.
A Ceremony of Carols Op. 28: As dew in Aprille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719ab797c5246b0c1493aa4defb6814713e684624257e4a9c86492a7b8f8c19. 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/SEBAA0700321.
A Ceremony of Carols Op. 28: This little Babe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c74f88066e2663ebc157eabbe259a4f91715b0d9f7ced77dc7d02e6adb5f8d. 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/SEBAA0700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367ae2b6ab48be4ab9dd7c7a6f56590df9896f21c698d0ea8ed696db24fc278a. 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/SEBAA0700323.
A Ceremony of Carols Op. 28: In freezing winter night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28390f5867f01d31fc8cc9eb7a85041ed1f9670308af9f0a2c6396d60aea2a84. 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/SEBAA0700324.
A Ceremony of Carols Op. 28: Spring Carol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124f0031ff710868fa095e373442cfa4addeefc16f871a062cb24e58f9e8f81f. 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/SEBAA0700325.
A Ceremony of Carols Op. 28: Deo Gracias!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c688b7c4bc0113aac202183e116689249ea7d4aef02f94f655fdd5f372056. 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/SEBAA0700326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68d5b26ea44c021ed967c45eaed4e5db32c5f6e32e2b90053902e0a4ac3b42. 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/SEBAA0700327.
Adolf Fredrik Boys Choir - Sacred and Profane