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 0x93675b0a52c9242b1b7bb74fc903a2d21b6dafc2c33b41449eb9aa1148176274. 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/027d718b-0b2e-46e9-acd3-819eac34e592.json and https://artists.proofprofile.net/proofs/artist/027d718b-0b2e-46e9-acd3-819eac34e592.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 0x07b39c415eb93ddcd99d757c00a00bb6eef45df1c36b9cba54b03bc2588bbc9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC2573212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208b8a2892296580ee37c8e430c8efc8a30ed874eaa19bc8fe12ed4b827a5924. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUBEC2573213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c34a2c2ea3563eb5e0651d24ecaaa6f7b144cde12f4860612cf9b17d79d84. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/AUBEC2573214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52c4b298028d9eecacee321a4df103f70f94a3dbfc5a8a7ad072d2da0a1548. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/AUBEC2573215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a3fad70df512ed0083fb8ad9eb13c6b401a0a41b405550e1b5bb077eeff3f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/AUBEC2573216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac8cd0095d5a4d46b7fa47d522eb2474bf21b9a3473e0fd86d43685d6e42c9. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/AUBEC2573217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c78c0117f3feb7727ba75bd61be3c87accde57cf03ab5151cf8cc58be4931. 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/AUBEC2573218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5361a8d716930006652ae6036ae44c7a1e1f2e234d1343f0569677af6f28a7c7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC2573219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9cdcf3813a49df810dc44a22b8c8fdaa85db84fd75d79abd5ee7e03a5b6851. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/AUBEC2573220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4781aee1cd685ab9ef302f3b12864b2181e4b3c1dbc5f754ca26b7c62902ab3f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/AUBEC2573221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd140ca9a07eac760dea2e5931e59aaa77fb9206f4dce1a5046308fda2257dd9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AUBEC2573222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8dbde41cda439cebfe39df78e1562dda339f1e386f95603cc8c1faa685eb3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUBEC2573223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ee3c592481f7b05e43a7aa88409ce0867a6d2be3efcbfbc1767a66648ac24. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/AUBEC2573224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc2aa88f39c4ca376a82912d5d4109586afe9a89960c19ac0df521a554b62f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AUBEC2573225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a85724e7945f6b4fc2244ee657521c5c8c3a1162cbfae3eb227d50011bca3f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/AUBEC2573226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302747b924f1e8841f57b8664831d5fb14bba90b6c09381410b5fbe8703abae7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUBEC2573227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8164bd31c62f600d32b6d920e32a939302412700f391db61823b7f0e4880b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUBEC2573228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099fdb15041c9b3ed898b01f234ebf3e3be452218ff1edb25d625888728c103d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/AUBEC2573229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e148fdd9a8933eb116d86b29adc3555a2aaa50934ab04047d12b99faa66b6f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUBEC2573230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5351d9d8af2ba3d09450fb4b6d179edd6d8005d1b1fff0d209e0519209dd7fd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUBEC2573231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ab850905160c354dd14dfbfc40c0d6773aeef386f4d67276f07afd900d9a4e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUBEC2573232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d606c91acd2d67d69934f1794e1319595ed7bc9714838594b46b45bc84c5029. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUBEC2573233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b7b11849133869bf8e061721bd0d36c5eeed6a8fcc7329cd07d21a54355ce. 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/AUBEC2573234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b43a18ccf4066b96d65d6ec2fad245c9555c0f9256c3e8537f352f8cfb2a72. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUBEC2573235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070508fdb8de5afd96cc72717b1af9c53c4e9d3ce352dc7eb669e23488618fec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC2573236.