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 0x135efb50210b6e4f0f06a53c74ba0c4d6bcefeb10fe2f673c45740a2e3953747. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b799db07-2084-4806-8496-aaa06275e363.json and https://artists.proofprofile.net/proofs/artist/b799db07-2084-4806-8496-aaa06275e363.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 0xcf2be404a2681f1441c7bb3e5c7d41895167e246d3db05fe708805ae7d65d5ea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TW2151740001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95330f1328749a6ec1de05132d8ab6df0a6c0dbb6a18ea187782978cbff47ac. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TW2151740010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09039e5a3949ec30f8477d1145e5c8c3c62e8dc8be80503affab77d124032a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TW2151740015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9333cafca055a181c6514248d718273925b38f64a04a9f7027bb250eaffe9f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TW2151740008.
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 0x2e2af9fa92763ce3d5771dfc63007c05cf5efea6236d6c84e041b16c474c0f88. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWH211502101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea38abe0122a5355efc779362b6cd07f971c9d96a3160d56413da6be06e9e42. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWH211502102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff6452a02bb8c11c4fa2df3e2e89613651be255b05ce7d8fca3a2592d88bf6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWH211502105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790c5dcddd8d27c6f3893449cfb5cbb57f4d45d1a808f4b0d4dc7adc39624c3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TWH211502103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ce88418aa8594978a8976c315d3031a3214627fb8652f6022f935518a2d238. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWH211201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0be4f68f14c016c46628b4d2028e30418f0d3d7a76b8011012cf09a54baea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWH211201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b4e2d20f86cba8fe37e940b56e3fca266fdcb4faf00bfa72c3322d653f9692. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWH211201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4fee689b31de3a2d73c3169d708d1f4146c04f3afd07bf1b48d6feb67f9499. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWH211201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe3dce0d0d794565f107eb9263ac4387bffee1157ed171ef6f62ec2b36ce276. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWH211201707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89fb79470e5e3871f1e3589ae9c4eb05c6fcb819f203d16cdfe6b405394b93c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWH211201708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892176deb96b6a0c9ba01df1b29001fa265af2cb8333f369ccdaefcb4749da3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWH211201709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d136d8cb2c4a4ea809972c51f5b3acefec01965cc2dd2774f70b48ba9f2bd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TWH211201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f65840d1195423996a3796477f3036716bdf7f7617f8e2a9161d7f496c2723f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWH211201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c3866edbd1689d90e15f3854003078955cb6eb5c389dd18d700011d2eb417c. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TWH211201710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1ad5fec309a9cfbb1b8fe8879e2e43796e5d7abe64288249b88957a84b0b4d. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:44:39Z), 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/TWH211000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d33b2c0df8bfe3387849020ff725e4f4e4c2e4f99593ed2ace66981e36bf2. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TWH211000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441c424924611d6221612cbabf35e3ec06ae25c83be18620c9af5093dad983cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWH212003002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67519c4d23dfbca480137801b4e856b375954d1770d90321f07761ce66343fc6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWH212003003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb23f05905716fd5b9ab76442ca972df7a032129075c090a6ef9b2327e6825f8. 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/TWH212003005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dbb80fe42762e5f88138e3bff77b021aa05daee8d57010da5c2d42a1cbcab8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWH212003006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd364b682148351e88f1978018e05dea21bed98526d11df27ba1449ffc8d666a3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWH212003004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d672c986441507eedb54a1147e4ba21c7c0f93f7a55466beb393a841a29eccc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWH212003106.