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 0xb1b67837166266c2b98a0097e8ae48d39553281c48fa9e55995f1a6e2abc88b5. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8bd91e2-c3d0-4974-bc04-357e716ad3fe.json and https://artists.proofprofile.net/proofs/artist/d8bd91e2-c3d0-4974-bc04-357e716ad3fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ding Dong Merrily on High (arr. A. Hogstedt and A. Witschek for brass quintet)
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 0x5165fbd7996e0e31e4f2a87c7319b3b925a4ea7573493dae5ce1aa3b840e360d. 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/SEBAA1300801.
Karl-Bertil Jonssons julafton (Karl-Bertil Jonsson's Christmas Eve) (arr. P. Carlsson for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6198fe8d67c308b77d02177b0e54f4c93ec2febc3a7cf09e2cb1faee5a0936f. 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/SEBAA1300802.
A Carol Fantasy (arr. J. Iveson for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14172abc349316c67e4fcf5a365db88e9eab837b9e7f0bb47da4cfa4c80b327. 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/SEBAA1300803.
Till Betlehem mitt hjarta (arr. O. Sandred for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94096c1b5bde175aafdad7218795ae4395c73fc1a5166c8ea43f641ee96e3922. 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/SEBAA1300805.
Bereden vag for Herran (arr. A. Hogstedt for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098df91ed05436135e12f3fc39010ff442ba9e5f43f42654d5e75a7c1eb0872. 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/SEBAA1300806.
Jingle Bells - Deck the Halls (arr. J. Iveson for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04479b4f9fd0ae0e33896ebdbfb8fad667f7fbba0467e3600799a1244f5d394a. 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/SEBAA1300807.
Stille Nacht (Silent Night) (arr. A. Hogstedt for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94028364bd8e586e4fb5c1bcadd7be791ab386cb32ba545eca528d9afd3ee1ea. 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/SEBAA1300808.
Sussex Carol (arr. R. Harvey for brass quintet): On Christmas Night Sussex Carol (arr. R. Harvey for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80a22a1f384614c5ac3c31d9ade75463c2e308afe86cb4afadb23f342364227. 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/SEBAA1300809.
Coventry Carol (arr. R. Harvey and B. Gulland for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e6036e58689bfaab4f14c4fba5d8318562cc2886d034ee8a715cb98b880f1. 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/SEBAA1300810.
Infant Holy Infant Lowly (arr. R. Harvey for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa488c78fce481a9c80bba6c9cbd2bf7307454b5149755fd2e7b1bc4637a3c6a2. 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/SEBAA1300811.
Sleigh Ride (arr. K. Snell for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20032daca4138d7432ab56fbe56125882faa3029f5ada58ea9e694f77fa169fe. 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/SEBAA1300812.
Have Yourself a Merry Little Christmas (arr. A. Holmlund for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d4d3ae8c5bdd1f4b5bbbff61f93fb5fd61c3dccee93b259669c4abbbfe839. 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/SEBAA1300813.
Nar juldagsmorgon glimmar (arr. A. Kjall for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507345e64bced019c7136a76849e87f3f441265ef9196dc45257f2819d3cdf68. 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/SEBAA1300814.
El nino querido (The Beloved Child) (arr. A. Holmlund for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177a7fc8da2d55a6eec696046c3d584f3236b9e94fb7e249dbf283d46f8ec582. 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/SEBAA1300815.
La Peregrinacion (arr. A. Holmlund for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d380689691ed60746996d3c2f4e06df4ba195e2f911c1735c79d2213750ce6. 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/SEBAA1300816.
Det är en ros utsprungen: Det ar en ros utsprungen (arr. A. Hogstedt for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f629d47e59836d55587b766704526b7ee69dc3cd9b9a5586ca00e124f79e666. 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/SEBAA1300817.
Adeste fideles (O Come All Ye Faithful) (arr. A. Hogstedt for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354f3dd3115ef6aa2172cc380c73f2f58b961d81aaa90db2c5bb81ad10916ac. 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/SEBAA1300819.
Joy to the World (arr. A. Beijer for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857960c52cc4e7d20ba3bc6beae7630dfd855f8c668f657504852031ae8560b0. 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/SEBAA1300820.
A Child Is Born (arr. G. Lunden-Welden for brass quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5230607e134a5cebd7305f3de2bd02a92d7117eb6f494ae632af4a9bf567c12e. 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/SEBAA1300821.