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 0x985229fe7da1d801e2f0b20920373cc1a10ff9028fa0c499b49bde0e8a184baa. 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/b64df210-70c4-46ae-803a-6ff441815fcc.json and https://artists.proofprofile.net/proofs/artist/b64df210-70c4-46ae-803a-6ff441815fcc.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 0x1d4f763a592a85f8ba2df8f9023c8f3aff25be2bf1a7e670cf032597d5347935. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V81420175.
Christmas Karaoke (Sung and Instrumental Version)
Sinfonia gregoriana (Il canto gregoriano con il fascino della musica sinfonica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cc514ce6683f7fe79040550ced48f7c95f3f04b5027d00c322357367d355a3. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ITY871500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc9c5b7b71a513e5dda5943bb8e31498efc7ec7b625efa1242a7b1beb82788f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ITY871500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268a25cbcb21c03c17511efe3a1a868d99cc3cb958187f3231f5a6cc6a7b717e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITY871500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f16b433ebb92914286fd8dad376f088d6af52e09635f7d9389349440ce6281a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ITY871500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c37510f1c7a0597df401312f67f2b93c0d1e987068078d9b99120af9e76132. 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/ITY871500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfa4ca0c249d5e5801f0c5223bea9fbbedfd8d718b067242ec8682e64fc7178. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITY871500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924a2ff0b256dc7484716430de7c27ee78e996d1062f9822f31a3711289a4c73. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:50Z), 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/ITY871700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d72c1bc2eb99aa9b62ae1c33ebfba039e62a0659ae5882e062dd65f75164e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITY871700165.
Classici mariani, Vol. 2 (Musiche popolari mariane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3a1fa182897f579d9e6b0edd7c961b635e5bfab6fafa8baf29d3e8c13765c. 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/ITY871700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd77fc26f9f387438b51e245cbc9cb6266d4c9fb54ffbf5def318e941f3a920e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:12Z), 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/ITY871700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa084ba2db353aac306a41a2fd2df4be55b716881355d5274c9b9dec681eac2d5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ITY871700264.
Angels Sing Christmas Carols: Traditional Holiday Favorites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5529d83eb5a8408c6bdb8b9bad6797cc7941c7bb3563879a3f873df574a3ba5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITY871800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1759696cb1f42a62d9c4c8b776615943c54b69c5ed83184a7f18e1866c7369. 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/ITY871800199.
Classici mariani, Vol. 4 (Musiche popolari mariane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bd1641a659e0ca9ceb910f2dcfb47870455a6a9f681598fab7ca4c055dbd30. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITY871800239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4afb5025d6fb1c50dbce966bf53ec20f045f7573f35dc029050baf8adc828. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITY871900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc826164a9f4d1aa5c7e310eb6639067b0ad976c5903d91c3bf8c2e5e59e1ea66. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:34Z), 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/ITY871900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50327d19c239b26953ebf5210245b02f7856c8f28817c33ada487992a1dc21a1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ITY871900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661141d18c5646ba384d0dffca4aa995506d6fe8a2c5512d2810d6785c771528. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITY871900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652063ba04ff9d2496f46b5f47545f92caae7857838d0468e54b449a07be8f3d. 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/ITY871900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e348ee94f6736494648358e3dd377437b504721bd4e49bec2ee9477690ec07d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITM161905907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9486c349649c1cd8ed1a40b22f610ac7ab4738e5efc6238cc286ac5f42efee63. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:51Z), 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/ITM161905910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cfac98a916dab05237f32e281f0e7f334f3125df0ca9c04bc8cc8effc5b5d1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITM161905919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83236839eb59957499ed9948e24c6d309d728527fc62808c684bfec18990ad2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITM161905924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41455bbc0a2874fbed5899a61ccee4a7505232f0094fd1def11ace0132eddaad. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ITY871900457.
Classici Mariani, Vol. 6 (Musiche classiche mariane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b048b106bc202529ca7f015a41408a066c33d870932867db4013e820b2726. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:14Z), 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/ITM162417111.