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 0x9e17b64b712f94d6e59897e97789585be701eff952381de8285a1342ba072b54. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca5517dd-799d-4ae5-9445-0c1a5e27ee91.json and https://artists.proofprofile.net/proofs/artist/ca5517dd-799d-4ae5-9445-0c1a5e27ee91.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 0xd383f1118bae1411e228f66a16b569111b91084d954ef999ce9ba2565da73abe. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:42:30Z), 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/US4R31016695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c8fb23ce20ee7be073fe35ed08d40da44c2468ad3acd62240c90fd2800905e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US4R31016699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aaf56d0faf5f76f867e7438d435556d6b66fa4363a9fcade2b3ab44dff7770. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US4R31016702.
12 Revival Hymns & Gospel Songs, Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a2109df3e75c68c834a91920b0a3eeb039ef5e07d49e3ef0631aa288352984. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US4R31016276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a27293cad5c6fca769b3a393784b5319f0107d21de03f776a70cb2d2ca2ae1a. 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/US4R31016277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70735c6617e07a8a74e1b360c4e265f60ccc15abcbf2b8b4dd75d4708e3b021. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:18Z), 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/US4R31016278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c43d9cbd8aa0ad921ef271a99db3c7699ed420a4bd721022148897a1c6085. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US4R31016279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b01842b55d5f540108a2d471d2dc904aa518d72d89588a65bde554d290fa5a. 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/US4R31016281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de416bd66df08ace641e7914eaca293303ffe05ebae2758ec5ca5558d137638. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US4R31016282.
12 Revival Hymns & Gospel Songs, Volume 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e599ee64345892e2c591fd7bf24e47740eaf3bf073458210a714100ea19678. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:43Z), 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/US4R31016288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624b39912922812bc8a7c7373b4138547454cde90fba7fc86f8763d1fc7bbea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US4R31016290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35339940838531cda0f1c43c8f7d87f32d00868405739f5d7873f96c308e995e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:26Z), 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/US4R31016291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088bdffe93526bf3d8c4272e0c0311ac8a78a78cbd04eeea18216ba4fbb71a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US4R31016292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214bb65e0cee16d21902c876acfc1784d1293f460524e6c7ca022e077345cf8d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:48Z), 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/US4R31016293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8da1d779da9847248bed8c827e57576283aa9b3454f30230ca7b48b21af81. 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/US4R31016294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde55874983380632d4f16418b0ad46cb28316b74d705313058bc73cc94c792e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US4R31016295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025421397a0d2517495aaf97c39ac47f7ebf3acb8cb4edd8591716bd0fd58c8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US4R31016299.
12 Revival Hymns & Gospel Songs, Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc13af1e2d25b7c9d88aa6cec4046b5a8d6f9631f8726a1a40b9018400ce958. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US4R31017896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93564a7671d7a12962e51cea587cc989c5386f782469c73a578a48f392d0cc8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US4R31017898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f03091aa7b56e91892c41cb072cf1675a71705bcc527645efddaaf5433ca49. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US4R31017908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19958875078cf049a9112bb61cae65d6a1b5f5eecf06ae6592b326763406477b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US4R31017910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3354ba4446106758860fdbd151c1bf42405f4c3b136eaa65c9a4a2e0fa70bf2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/US4R31017835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe0c61e235149b23b99d8a98c6fb955cdeba4f369b689535c33ec9474b752d. 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/US4R31017842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d848c59012cc8b7deb10ba76564b88c9f0d6f9d9c5f331e6cf530395ce91d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US4R31017886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8175a00ad28d702436ed849a6627cf36ba715b61307c67c6e64c1e9a413a86a8. 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/US4R31017857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eac763d743c10ce219b9ef634ced81b6caa11d5ea2aa7bc32ec37cc7d77e5e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US4R31017862.