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 0x4bcb6b931884d3a9830cca1adbfc00435c6c4c66d2cee14a377fc6904a0fe499. 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/186447ac-acb7-48fa-8a0f-2be8d229d23e.json and https://artists.proofprofile.net/proofs/artist/186447ac-acb7-48fa-8a0f-2be8d229d23e.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 0xd195abe8378b470b20cd77c30f2b195c1c54555ee94b4ffeb638c35f073265aa. 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/USCGJ1465963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94150cc6d0208b488a081cbc01dd1ee2500a509ff70e92e90bc94ab5427479ae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCACM1602110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48deb61cf5cb046bfaf5678dbd268a9284976bff96641cf8a5ff6874db65a2bf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCACM1602120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864aa7561284bc3eefd42161c06a59bec0b32abbd1af5d462f2db71b76146186. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCACM1602122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ba8518076338e33b00004439b2306673b5323c4823939020519134a5c9cde6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCACM1602126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0c42d0c7507107dd73bea635dd874b40e3d4cfcfa8c3b40464b1a0149344c1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCACM1602127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8206d9ff817d58e11b5a373427e1e3b487f3d0688f289e1602ea70b00d49db97. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCACM1604002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4edf58cec43e5c3ec13e4e80b8b865e922b0593398fec5d2d202f3b3810b11e. 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/TCACW1750087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b58e3f5f1b82fa9bb6432ba64bfcae808813c9bb5afedbc67d88b258fa96f2. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/TCADC1755705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f096a833192808bab355fde97fb6a73d430322a888584c248f455edd1dfc45. 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/TCADC1755706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555fc777b05a1d9e60f50e0107b9a099410920a48f894373a3fd9ea5e2487fc. 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/TCADC1755707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3369f90468e31beaf893ee8cf5d5e90073ff1f578e18e4722c47cb41e3d05869. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCADK1708602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7968548ac5d172719fd3c9b79e341d143ee57422a2cfe6fd3f45413a97281aa7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCADT1831645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf1ae46a7d70ced7917bd6bbf15dc36fbeb2e0a8d4fddc68f862f4a71662f57. 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/TCADT1831688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1153f652ed2d2280983f7d796c65d9c6a406b0a367cc90434fdaf04187d4d9f8. 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/CAV161900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93e1d1246f492ee99a60361080ef7234eb194d7795a9f2e8da3e967e21fe72. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/CAV161900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca36f83df0a35b3d4590c86d34fa4418f8c8b3b84eeec9ab21cd279f4d4bf16a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAV161900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca3e7c3e209adb957ed9bc59ecdf23fb2cdce9e6516840b6095bb549cd862bf. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CAV162200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383ea05e79dcc3957a3cdb4010f841e18dda8e82df2885b7284a15fd3e4e463e. 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/CAV162200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6948987fc064f3dbec6e865251ecf714709523b0a1669ac1b4eadfbd1852cb. 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/CAV162200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cd960d015889ae15896152259734d88bbbecf9482a1f18989ccd44ad8bf577. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1804762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cd960d015889ae15896152259734d88bbbecf9482a1f18989ccd44ad8bf577. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USA2P1804762.