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 0x4943cefc649e66fef8d2c4ca2d927ac8bc0206726d447aa07a2db22b22cf596f. 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/446cd130-1673-41f6-83ab-cddef50b60eb.json and https://artists.proofprofile.net/proofs/artist/446cd130-1673-41f6-83ab-cddef50b60eb.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 0x45f2e99e00844423a30d2f4943c9608fefb54b11343697c4e8851898104f3070. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GBARU9700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621b07e787423e1e084ff6615a24086a5c1cb788e6e3c621f15b49bf55779e4c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBARU9700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5aebc20d16db10819ddf821ce08c0ac2ac8f4416972f3ec4a1d590bdc7ece. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBARU9700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd47e0bbe9a52fdec04612bcc1081e08e21fa6ae8c1e5d7999c17861b72df33. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GBARU9700216.
Three Pieces for Musical Clock: Menuett - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79da93d8c77f512a6159bba4f6e2d16b920ce78c42d95526456a448b081cf90. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBARU9700218.
Three Pieces for Musical Clock: Tempo di minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637636bf6039b25d52334f54a2a2e62b784d191d9d8ff7fd80ad226a4ba5a3bb. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/GBARU9700219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cecd09f08230c5da98f870bfdcc81ef7dfb2b379082cd9f542645e8f766d379. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:38:01Z), 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/GBARU9700220.
Marche Triomphale "Nun Danket alle Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c58c51f4d3d603bbab349d62a7a73968870d6872463939fbd23807be7afc8f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBARU9700221.
Rhosymedre - No 2 of Three Preludes founded on Welsh Hymn Tunes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ab20518215597a2bfd7557915d6642d21d354436e5999f7d769876bc071e0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GBARU9700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb397f727ddd4eb1042bf7ec06bdc5861d24d89fedc899ead028da9b5faf4d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBARU9700223.
Nimrod - No 9 of Variations on an Original Theme Op 36 Enigma Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3fdc584791a972e67615fe09252ac0c36f2eb2889757829f988c6971b8fe7e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GBARU9700224.
Carilon de Westminster - from Pièces de Fantaisie Suite No 3 Op 54 No 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68539ac91b0e46b82b8270b1723a0b77bef577c7ae7834e0b2f07920b697a792. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBARU9700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f8f690ba4f5491a73b45a833aac0ccc411f8a20a61340199e3f609dbf4597e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBARU9700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2e99e00844423a30d2f4943c9608fefb54b11343697c4e8851898104f3070. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBARU9700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14edf6f1711909d42f8118d0f246d8a791c8a5f96c2978850e7adba7141118. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBARU9700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5aebc20d16db10819ddf821ce08c0ac2ac8f4416972f3ec4a1d590bdc7ece. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBARU9700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9576d4e1c5da90bf0e3924306f54d8702c6eb1ecbd41fa236bb7b4e7ce8ff471. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBARU9700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c58c51f4d3d603bbab349d62a7a73968870d6872463939fbd23807be7afc8f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:51Z), 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/GBARU9700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ab20518215597a2bfd7557915d6642d21d354436e5999f7d769876bc071e0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBARU9700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb397f727ddd4eb1042bf7ec06bdc5861d24d89fedc899ead028da9b5faf4d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBARU9700223.