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 0xabab85b2ea16f8caf89feb3b181a956faa3fa2b081dc0d1aa888859dd1ba56c8. 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/c4541494-8162-4828-92ed-6d62d30a6e21.json and https://artists.proofprofile.net/proofs/artist/c4541494-8162-4828-92ed-6d62d30a6e21.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 0x6bf42e1ebbd2aed2ec4ae251d28cc5bb93b9428f43d3bb5e57d6721f982d6daa. 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/GX3Q92378153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eb9cd0170d9c0832c12523f1195bb3562affe86adc2451b51b84b9fc18f44a. 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/GX3Q92378154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dbd62ed010f760ec87b1e66517c8150a44cc771e20b0571d8d7ef745553a0b. 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/GX3Q92378155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08429f085c0fb79df0659eba7e714213a5b9cc1e76c834638b5ecef8253293. 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/GX3Q92378156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09fb6abf7ab50d9fc15d027818055ce229b03e9f826a171f8d4db2088b51cf. 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/GX3Q92378157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484e45d310ef57399b78870edeb112d7d9844816d59c94ff7bb0ac45b20b676. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:27Z), 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/GX3Q92378158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c68903c337ab3430235cb94c95cdaee7381c02317ce2c99fdf650d479a91cf. 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/GX3Q92378159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ee1eedd558e26288cc143094af48aec62c90778d17fa8935698ad322b5036. 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/GX3Q92378160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e507b59838d1d50021e092db6bef1f7bcad4eed49a500ae4d03b816a65dc078. 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/GBLFP2224047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e9d0cd1d7dfa7677409840add21f1a9fd3501ce101eef7f505a1bcc9d2b31. 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/GBLFP2224048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5798f48a898ecd408d93a55c9eb5050d4e04860bee8f698a21ce43c324042a11. 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/GBLFP2224049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e67198290c849a12f00ab4297e6731174db6f4b727c980b6ce0b0e5158bce0. 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/GBLFP2224050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80effa01ae19176296115a30e54e9ceba2a1ee7035a347479ea7888f41196e05. 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/GBLFP2224051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a79148bbcf05d3215d4b3393009b67942c393686052c7ac143dfd646aa4afa. 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/GBLFP2224052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8390e73ee9cba93ee0c285b5f8bfc32264da1d31b95bd3336bf8fe0b0c5a9. 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/GBLFP2224053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832b1b0a8e20caa081c267af0590ed777ae542334df0a071d0698c0ec115b69d. 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/GBLFP2224054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4931b6f44ac1635a6100ec055f40695f886c866f60774696c31c237b09a7c50. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:03Z), 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/GBLFP2224055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31abef354446b67667b4798fbf6e3c9075d3e8d0a1a5f4686320fe60b478aad4. 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/GBLFP2224056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9065464cb98952eba20647ae764682a5ae52ed89e6199b3fe31c597ad295e488. 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/USL4Q1810735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f9abd53a6ee1fda0aa52f0142987d656f660af81bda47e63834d839ec1d819. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USL4Q1810737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298017bfbed6c380a8f3afa78874635e1ec5ecca27dcf46e1d4a5434fba238c. 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/USL4Q1810738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94024912b6bea44399f7051cea1f394ea1e25c39b8f9bd7919d806346008c18. 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/USL4Q1810743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed64992e988d68ed2f70aa0b771c21dafac0dade8c5178e52227d4fcc4b0d8f2. 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/USX9P2029872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4b34e9dc54fce447f7ec2ed1ede9d92d672ca4e139f32858689fdef905908. 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/USX9P2029873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbf269fba6a13d71b328f146f177c265b5c15eb586d4e4637540bcb72940d09. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:55:18Z), 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/USX9P2029874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3f38e7884b17d060286031fb530ecf2d16df728fcc6224381457425e64ad1. 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/USX9P2029875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d3358ea8c229f84318b615f94f3aee5be8fc3aaafb5977c6c24f85455d51a3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX9P2029880.