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 0x9ab72fd2185a229ddec34b6be91a826056a606bf7957deaf1394a846322d0968. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d46e4731-3446-487d-a54e-e2dbc7610525.json and https://artists.proofprofile.net/proofs/artist/d46e4731-3446-487d-a54e-e2dbc7610525.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 0x74ec9dce85ca88f04b885634299848dccef21cb683eac1f22ac11e27ff7c7878. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/HKI190740301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d19acd35f49e0cbbacffafd89d26102edc7a272dcfa7bb6a0571ee5a244838. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKI190740302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273b8c0f25ddd156ce3b0724e7dea13b75575b6a83b0152905dcf7aa09cf260. 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/HKI190740303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8269edeae662712df1eb764bcbda655f340cda64ac4e4ec49a8e980ed4007055. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:17Z), 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/HKI190740304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff4d584fc9231265b805cdc248dc2da07fb1b6ff2fa2b3ba64bacd2d1bde08. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKI190740305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7fdb775b199b916221d6fcc424ac1dcf960737547978e91b3ce2fc8f0ffdc3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:00Z), 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/HKI190740306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9d97a3db6bb494a25c89319af324e6099f695f86c2f620e457cd47eda23b7. 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/HKI190740307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9293a1302602681d1cb2c876aa65cfb8eb16b1245050901b846f042f555ad38. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HKI190740308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7cb2b2bb1733477b674b5d9b3f7e89c2bbd1110c912bfd8ce0f6b0516342f. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/HKI190740309.
Sånger ur Majas alfabet: Midsommarblomster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ef8eb4643741ef70b438ac39489c7f09a51bb257fb03a801293b763de477f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:18Z), 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/HKI190740310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ce58e73c40d66ffe6ccba63f5f6a38521f3697950dad69680460611952b35. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/HKI190740311.
Ding Dong Merrily on High (arr. A. Hogstedt and A. Witschek for brass quintet)
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.
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.
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.
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.