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 0x9754d2800de5f13175b3314842b91c5f317f01f2e255e9d4b2429ca7f7d7ff96. 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/484b7242-287b-4ee8-b178-cc41a492fceb.json and https://artists.proofprofile.net/proofs/artist/484b7242-287b-4ee8-b178-cc41a492fceb.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 0xd87128d8e55c4503d4104d2b449c771fd61268e333192ccc5e788d46249c56e2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLH9K1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfcdae34d2065450a9aea23a084a56021570a1b88adcfd12d6304b5752bbd6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLH9K1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1eb019b032852ba30ff90464cdd6065122f79cb5e1bd24f6b108adb2a1bd8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLH9K1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c491719f4ed8c6cc9787da205120760a6409e6a030efd3f4d4d075c4ec32f8f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NLG661600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7c68373258874a428310175aeecaf0fa8f499c1bd16d15a521bf265525347. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:57Z), 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/NLG661600241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64d45c32a6878a8f8408a32c4ca69bf730a0ea9384bfdb5f1be2c177c94adb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLG661800986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b503f7492f4985618ae4c82885ee4a5591e5ca35ddf8bb99cb339adcd2715f. 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/NLG661900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a36642c31b33d8000a2852c860b8f09329b15bf41c0a3de1df5af5bffaf806. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLG661800800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67681a83e402317f5ca8edb88df1184f1f4f6c954547e079aefaaa52e3690c9c. 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/NLG661900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f48c20de032d5a1a63678c917575bd928558b3d627a124112c61036b2e0da9b. 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/NLG661900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f308bf841284edba26c7f5e70eb767587f4f62b4f9e11cf5123f97b5cac593. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLG661900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d7545101c2da847baa220f3d7007bebef0dfd7daf91ee4dd7a8995bfac5909. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:17Z), 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/NLB602000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592bd3a56a6f27c145fdc3e4983845f5a449e55230ad89dbb66f5d04c99b2a2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLB602100355.
Vrouw van de Dominee (Live @ Radio Veronica)
Vrouw Van De Dominee - Live @ Radio Veronica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7667935dca0670a3763c8bb144459532c67827455b09b07982bff84f286acca3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLB602300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7761f0d0af4440460067ca1c29609c6803af8ff784b6d12b2fe12fbb3b9dcc33. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:47:18Z), 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/NLB602400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7e70bfcdfd685fd34ce030114feaa3308a7997b53fb799c9513bcfc1f04005. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:46Z), 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/NLB602400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ca493650a824207b9401c20aef06d38aa496d6a56f578440c61fed9321020. 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/NLB602400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294c317cd8fbe89d3f52de35240bf43d93e39e5c90f336a53c73d8e526ea91fc. 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/NLB602400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec9dacfc711bc7565fbd0695e4d89358c387a2640a90ca49b8d6184ddbb7093. 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/NLB602400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9621cb06b47ec18f31c74db71bb261f64abb587535ea272c5b63f14b010b0d22. 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/NLB602400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e3d52d7e714b9b8d92e49fb266aa5f63dd4d7c75b0ce02f0f2b17474d2bcc8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:59Z), 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/NLB602400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8893490cd863aadcfd5fd4c01c2f6364f14d050dda7e4b4fdad977e33912cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB602400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6b1c467a8a0e565b6d6cec2592d1b0c70f8f9d5d26e5e8caa03257284c47b7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLB602500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8ac4e645845f335a3ba0be2d0613e5297413c645c2a9a8a4377af27293f46. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB601700199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf3d7b7bcaf0e04690d4df15f4e116f8a0f1af9c7fcb71a5950b577c888cea6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NLB601900221.
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