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 0x6bc6d44f9aeb78400e9be26a66409828b906c1b51687a4668692e49148f5584b. 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/857c513f-029e-4c10-9643-1f7174d74b56.json and https://artists.proofprofile.net/proofs/artist/857c513f-029e-4c10-9643-1f7174d74b56.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 0x7bb27f50d0dc8c6f1e9f59e373c2e9ae05e6a3b760807c45ed2672b44876b8d7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCJPC2444205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95604c8f47ece681fd128fc4bc36fbfef70d37b0b836490ca08525b0fefb6df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPC2444211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb100f346646b192947773ab50f0aaada4d672a643fe2f56b379698216b3bfee. 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/TCJPC2444213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41feb44f3a62a6e14f279868645c1f1ef65ee19818c8ea946772fd3bc7d8d71a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TCJPC2444214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b69170d716ff8b3df8d45760c10243a7398445f515fbf29651dce25b2b8142. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCJPC2444216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18961f9f43739e880eae49dc7ff563b792a45b43febd40167feb0c33e25178e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCJPC2444219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37734f3600942fbdebcad8f90f203430e1a51f37675f350df95269923e44e21. 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/TCJPC2444221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e57732803651fd29b57185ba99a844700228d6ad32dfaf6a5b6d432ebe0a645. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCJPC2444224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ed2b813458aa86be6cae4395fc7c72dfb7287ba945dcff0e060cacef2e0b03. 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/TCJPC2444226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae447959fdc1886cc19576a242c9efaaa349900b431e26e1fe84e5f3bd5b3f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCJPC2444227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029f62ea5210362810d8707288b66250534f730b9ef498a7159c081047d34a3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPC2444228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a37b50c2e93e319b44f1b6ea2116914744d3ae179990fc2d53b51c96825854. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPX2337266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a4917372f3b81eb3c76fbfe70afe5680e93bab7ee899723ddf644464acca0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCJPX2337268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a34462ba0bf8f4c5165fd70cbcd886bad8619baf19e45106626d99aa0863d05. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCJPX2337273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2198ffc29aff5c92e35c62f90f717a45c22f19213d4b611a2518be41c0275. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPX2337279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991e179b7e31dd8c1891b40827a4613e99495484d4c61e75725954dd55de024. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPX2337281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846087f31a90cfbdd58240b23f4b4967a13fcf8ff6a2f907ffad202092f07240. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPX2337286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c148ccdbbd0eec8cc7a3c502011f0e18964059fd46e659bb22052de6e3f21d9. 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/TCJPX2337288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243434590155aa98e60820c01c5b0c5874f4d84fbb74531665ba670471e7024. 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/TCJPX2337074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5857df89bdb6edfb1b6cad3c47f126a95e15c28a0cbf7d9052fc4376b2f1fd7. 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/TCJPX2337091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22479adc311ec22e685b1e276537506df055e68b53e0d3983ef4dffd11fc4657. 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/TCJPX2337096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeb4dff369e6472d812f933d8fb8eda058ce093a877b6294a72a10e4cd41180. 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/TCJPX2337107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ad89318a27968d0783754008d7e6ee1ddc5d4f953be3bd24324b4861ff3020. 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/TCJPX2337113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d6d800fe138bbdbff1db322cebf4f91ba5700595b45b29b7e60746f8260cf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPX2337117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fac02924bd9b648dbf30b66b059e8aa746276b446758bf86b529b88d5a4281. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPX2337045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995db45d331df354904322e4f1cbe7461bf3cb43dd52e2e3e38f2dfde6934450. 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/TCJPX2337047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024b0bce413ccb09c13a51727da421b6a00135d9fde3a6b0978ccf1e25bc20a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPX2337051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c4f251c3bd2de631d743c6432f3f07a7a547b0882456d3d53481daccc725b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPX2337055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f58b330b4c2118ed66f0886131c09793db9f8440c808d03ac5598c9bec29b. 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/TCJPB2446943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78074ba60467f4f1e1485f976df6b74925a691a33c1edba860aca46120a4453d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCJPB2446948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8487d1304a0f2a947dd184bc13b2cb9e23ed3171eae117526d189c9874c62. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPB2447004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb5894527a3087de22b0573aea5bc687401154c5ae6b6143a19dc42dac25f4. 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/TCJPB2447015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31db173d5ee1561420fef22f6d0066ce9385b25195046602892bb66e04b6db62. 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/TCJPB2447018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed039fc0e2d04ce8c42cb30226839fb0ae06de73263434bfa8803cffc1002dde. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPB2450286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38926678461b9a34f359413cc073075bd2c4e4d75648e54f78acbea06db7138. 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/TCJPB2450293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6376ad60f43522383f4e5d79ad2e1f917263d4deb72f77678bc4586d5c0756. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPB2450294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e75204ae4a776805e1dc42f64a4532a6e9ff3f64b80269dddf33dd7959393dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPB2450296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144fd0683e594b63e7302dc1fd018e20c4555738fd749c9c0f48d58628e6c55. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPB2450297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb377b00165bf12e56acac4cd18632ac3a7cc0d360aa0a6c769c515934a966705. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/TCJPC2444727.