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 0x0db9bbb30e47c470ba6035d107c193125b4be14bd3ff21eebb5a03813f4487ba. 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/be457a18-3b5a-41eb-aeeb-2f0f82426069.json and https://artists.proofprofile.net/proofs/artist/be457a18-3b5a-41eb-aeeb-2f0f82426069.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 0x1632c1e61d72ec5446ec3e7c2b9aebd6dd1ee3c5c346a706525da6ca0d1d6db6. 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/TCAEJ1975754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae385f4975a16a019382de8f5690baf3317a264fc50c2137b56a530c9cd648. 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/TCAEJ1975868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a21863387d9f8d78d0b9c5250a0daa065917ba4df633d309079d0dfd59d6f5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAEJ1975841.
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 0x72bf172ebcff1da7219ad371991dbbd2d1fe0b375f96d288c5255da8cc250f61. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCAEJ1975855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a9af5df590946739fe111f80796f260facab3d7809284e67c0c1a8db5ac298. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAEJ1975861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fd5f1ae3ff086e6a3f3f18455486c64272c3c80cef3ddc61b215d5fb662734. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAEJ1975865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12077046da52e773948fdb3b293a1a477e7eb7e0a0f85c5a06f85bcaaa1057. 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/TCAEW2066182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7533e0af88d35be9044caea364a0b138421f51ecbf11c809b6ec5abb8e7c8d6f. 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/TCAEW2066164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d0e22af6a9c03bbf205eecf093028d2dff75869b2192444715184143ec9829. 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/TCAEW2066165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2128de8ea324df6c4cacadf29e6c11971dcb5b285fa6e2069c80ed21ebc516. 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/TCAEW2066166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ce7c4f0be81acda346b3186eafbdf92880766cef9e9cce5d6f998b58df9dd7. 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/TCAEW2066183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a40d6537ad6499fb842025e9436cf1d3614b3c73ca49616b6507d7996b3733. 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/TCAEW2066185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc856cce580ff0b0aa0def704af67036a75931679ef2ed9f0b3d82d042446dd. 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/TCAEW2066191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340245373bb999854d56abb6da0dcb185fe02aad6bf7c70928c26ef3de90318a. 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/TCAEW2066192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271ebf1df9301c734537f9ef6241560306eb7df1346dcf866f84c207dc8be4eb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAEW2066159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a5034d970104af05b24152db7e54ab1f64de1358653e0f057dfd5ed99677b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCAEW2066169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0b301366cdc0b484208fe0b5749d6418f7708d59b24dca8de9d14fe8bf5bf. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TCAEW2066157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad6902fec9a0b44baed2d26a0af12ce05f158ae46bf6707de1d11ee65aa03fa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEW2066193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c462a8ab54388dc941efbe221d70a6d771b5a3c2ec25780d132c8bd75b43bb. 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/TCAFK2196190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb072b8c8af490a0a708fe4e2ed26e8bc5fe0d622e4ed13eaa32a9c7934f8d883. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFK2196224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fd66be2404c47a11e91931f88033517f1b55cd602e1fc0c7f7a8060e66477f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:56:37Z), 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/TCAFK2196239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f19c332a449606a2b8a3b715327cee69dad0c94eab71d20fbe9689c77f0ca1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAGA2200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e79bb77ffa77dc2651d21e2dff04b23965e4b12c1b1fd7765663b80d84227. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/TCAGA2296521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6eb67e9c11f317c21a5fa07b1734b5040ffbb32a6b47e52e01b7375e9d6a76. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZ5FN2300736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbeefaa739943135587421a3b2464169bb78684fcbf1c1b0067866702d7789f. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZ5FN2300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bfd622ffc6b94f439fdb7663eeff26381bdb83e9af9f48bc41c18b289f5d3b. 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/QZ5FN2300786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc549582956bd169fed7f5a7ee74fc4cc7959a79e26be406f542237ff645009fd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGY2390868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa1562fc7b44ae23821f0947b895c34c41d9cf105332165991d94bec9be80f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIA2424267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83ff26ca52279472900607ba1b6712a952fbc320f0539a846c653e65eb507de. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIJ2489508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b1d45db61405cfe3b1a13363d79f3c1f3b114004cefac80e241aaf3fecf569. 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/TCAIJ2489518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a088a67ac828c7d5e253a05a3555c8c3ec5ec259b4011be5b123ec89cafeae. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIJ2489520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d96a64ebb3a634dc950526fdd4237e834c112c4862fc4410d236b89a2dbd1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:34:00Z), 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/TCAIJ2489526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c9d325ebdbf2ff6511b9344c3ad31a550db199e74f5271528b13b3b2c195a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIJ2489535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66936b869e33209ab85ba9fc0a1db6083bc3363098eaa6be23bb2e2ea1cfc17d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAIZ2449832.