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 0x3df0f3a25a26fbbffa4874954fd585e18934d299bc4c4d6109dc301fd07cc958. 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/a82288d8-ca55-48f4-a136-07c1b5c1d286.json and https://artists.proofprofile.net/proofs/artist/a82288d8-ca55-48f4-a136-07c1b5c1d286.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 0x1c3e5fb4a774e15ec8a4977a3bab2375a25d631c119a113f91b8b4b4b1d7d1b2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCJPH1878458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aef5c445e3e742c5cb374e5618a46f7467fd3c097a80efd1a699567b07c1d2. 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/TCJPH1878461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26209e2e64213d79a2ef9a7d7f4051aa98d38a840908b5c3f5338e0a5e4857e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:21:28Z), 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/TCJPH1878462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefab0460dc2b230742adcd6440070f578b656d8b301f47a444e7820628fa31. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:05Z), 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/TCJPK2099110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3924933ad48ace18aa9b73f5f974df66ec3ae25d9cde708af3f660606d48535b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCJPK2099114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04218301c1294ed93621f1afe0bad30bae4f412f5a31df11bba1d6b74975adf0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPK2099124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b1b2ab5db5f5a14ed8ab700611be72e9d4d5d0c5659c4e51c397382f4ff481. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPM2037072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a023e88d4a54add8106422047c2a38080492332d63e4ec0de90683ba31225f. 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/TCJPQ2126640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cab7927284d717267a32c926d4dbdae61a73ffb1f7fc87ea73be2e2705bdda. 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/TCJPQ2126663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324272c98b4ef50f01fcc1b85a51992227e1643f4ea08838e2dcccf977c7b78. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCJPQ2126669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e48bdfd87537f454d3e29faba6123fad7fca767ffd0a4c5cb7e7fa0fdc449d. 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/TCJPQ2126673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eff3fa2dea2013529246cc572c2a9853d25d6edad73ea40d7cdd1b8af0474e. 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/TCJPS2267249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf56aa5fd69582f47e474a7c44ad1f6956fbea277ee85f7b29d67b0a1202385c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPW2370556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c043231452983be94c32036fa080f05e6f8b1c542957e133ae46364bf044ef. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPB2413758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb363e8998b44d62bfa6c29bf402b13404f9c74796fdcbb9c0aa52384c583f1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPB2413761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5061200d097991865b5b72d017b76093460e03645803bc06b73314960bf5a31. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPB2413766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769e79ebd3e3b329f8bf116aab2f0e2fa1fdbf47e330843705c4f7c6dc0cc85. 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/TCJPC2483631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30097fcd3c2e8680ea3f2167448df5b7f61df5210d40559f6d867df77db7f8fa. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPI2576114.