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 0x3b6a66ad5e049fddd52868e99c1ab4639681cafb2c27b0fc8d3a87f626acadcb. 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/f430bf46-e21e-4b34-8bf9-e3beb7352353.json and https://artists.proofprofile.net/proofs/artist/f430bf46-e21e-4b34-8bf9-e3beb7352353.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
London Bridge Is Falling Down - with Rain Forest Sounds
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 0x87d8ad52bb750757efcb1febb62bac2d6928a7e22ea73f82c95725ab057f03e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240834.
Skip To My Loo - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c67c8d4fd53642929cddf5d0973023dcec3131281ecc58539d901aebc78cd6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240833.
I'll Give to You - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8436c7f7897897020b77652edcdc36cc34c8010d7cd08892a4e6f6dfe195e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2240837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9619738ec23eb16d58eca7a6c5b25c171504e0f0f2260b20b9a5c5df635ad0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74789cb154cb324b7892e6960bd268951719ce6503ef7911aa1302105fdf08d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240836.
Polly Wolly Doodle All the Day - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d87019d0e395f25c664ccb4ea9dcc53ac64a549050d5f6a32ddac8d434fd0a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240838.
Los Pollitos Dicen - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427a98dd95fd0d123c5afe270c7a35478ccfddf24bad820b223f7f7d5091cd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2240839.
There Was a Crooked Man - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad1c9f42139432079f3067d97de4722e86629627418ec27e447dac03a39ec89. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722a2a1a942441103a98aa27fe82a1bb2c0fa83a52cc2ba1f537b531e1dcef1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2240841.
When Johnny Comes Marching Home - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7fe716ff54d66eb79759d6fa11a19c6787154e5efb0b6be623a03e2a74250. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240842.
For He's a Jolly Good Fellow - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b83824f41f9a5ca07617b585876e88e1944334bc273a67c146a2d821f9a20c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240843.
Georgie Porgie - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fcc43e6700764c1846e6a67aeb22a44bfe1a84cd7465ad41aa6e691960869. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240823.
Canción de Cuna de Brahms - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c545b59b7b14a07de2a7b1977533300fab55c0b77bcc72b869aae40a78fd24a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e8db80334b09b95de80482d243f7e15814a06d2a618eea7eee68a2842f54d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2240825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd86c1839de398fbe95df3840a56755e9e40b97ec1a40365ef2210924df47790. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240826.
The Grand Old Duke of York - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb317ca248e240432c33cf2245f8d1fa39682e3d9eedf5de1ee397e0343e31bc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cd98773577210319bb3324b751d6e77e132c0b44e01c0838f121b128985dc0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240828.
Sing a Song of Sixpence - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc134d18ae75b41927f4b6cbc90a9b7512747b4a237fb48301538cb554e5a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240829.
See Saw Margery Daw - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee38c726dc5ee2ffe5e58b21501047e11ed0bb5afdad253e96cd52a8cc4819. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240830.
Buttercups and Daisies - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b381f33716d578f55e41894e8c491adeb9311036b631e9ce1bc902bb370b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2240847.
Mary, Mary, Quite Contrary - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45853e5f619683c4d83c8e8c033bf324667c05258145453f36b650098186a8e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240845.
Itiskit, Itasket - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663ebd9d0e6af14324e87d55c4a8751570634b82d890275be6ef26a67b2ebb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240849.
Three Blind Mice - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71003274dc713b72c0766554a44c3822790349541be797dfc25578da83f3273. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240851.
Old MacDonald Had a Farm - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fbe01bf5543910ccacb40721277aead7534652db37eaeda1c8eb5ab5a1c126. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240853.
Old Folks at Home - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005bceb1916ba1182532e57b6337672327d9ef5384cba8629db7fc0c7f3d0623. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240815.
I Had a Little Nut Tree - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f47eff277f55eced3dde04e998a8a7cbfc7489569a6490ad0599409516e79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993afd662eb5ec0ac27bafc4d158ae46f2b4caebb237621afe49c30134a6abca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2240810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ecbe055de7af9b2d55025de302c2b71d5227fe4d57ebdc5cdf3c0abb756c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2240813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e6b9c1d11ae605bff22e36448223e5bb022795dd845c086a22652215571e33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2223779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26328f534b25680b68d46970b3428a2d86312c71b2d169713f91a69f6c42a68a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2223780.