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 0x3cbc4d51a8b509ad95e282d877c696de0895a102513c75ecffd7a5b5084536b9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfb1df80-19dd-4dfb-b93c-6fbb1160b684.json and https://artists.proofprofile.net/proofs/artist/bfb1df80-19dd-4dfb-b93c-6fbb1160b684.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 0x500016180885c66392610da2c12ceb86e66bee46125796cac7e9a820168881e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGX2304798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b3a952bb5f2820db6b6f0e50f118e5a1f1e07b9087e4547572abab37bf16b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFW2131856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeac97106eaa29a768070a8d4b548a2a821edc1572014e5d53bee4995e4f472. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGD2228941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb087fe346c21ab98795722c1b9f1f18aca0d53197d8e5442bb0269837d9237b. 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/TCAGD2228945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df972bace635e4b1d93a77eed596514b9480fb10770cf41907d835c437dc5e4. 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/TCAGD2228961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764cadf97db876343265699381735d1a5a7fe592a453a4fcdce1eb727004db2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAGD2228985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea20b0a3ce95afab59168ded632121c24d77ad742bc908e08e0bb248e0eca3. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCAGD2228950.
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 0x75a09edacf4a040f5bbb6e8f6ecf387da7eb58426f18753fa6e87ab2ca445292. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAGD2228970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4486b66b1f98b28e68c39fb7cb6373b5435df08c6cfdd7a35e7cd83e777284ef. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TCAGD2228973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d39368d1b8f1229562cdf40a41e708dba5e1bc0d2916a6293c58ea2d3056e3. 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/TCAGD2228976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4581b7098f3f9b6ee9ab119564f0a936438c61b84e68f8fe4fa29d6991e91d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAGD2228980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842e42614b787829dad64b2301908efc8ce9662b6d608c5526006a0e6a472589. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIK2421800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6750bc5c8d4a070db032f1b360db0ef6da4aab418928c550a8b5c20ed3e89b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAID2489465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ac5411b68a5dad94af13af81fb5ec86550cb115c6c5cbb31ceabed84a22785. 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/TCAHT2301590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70719c60ee5785413234f105146f98fc095872065b0bf8232441bc06df770cac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHM2315152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62606f7a880ae65ecce5af3200db20cdef7b4581e9879d15b4b7a16c238b4e39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAHK2317531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e9660d4e3341df553b4c51ab146cfb87ec96201f5585c20bd1ebec738c40a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHB2338866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234fd3618c7777f5fa60fcaba856a92c453c5d4e68bbd4e8e0c779d94d18d308. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGW2303855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3023aaf317cf0dab2e895619f9ac20a39e3d3fee2a9a7ddd74e51db26d77c9b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGW2303838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b635d1c8054afb6564c624e9f78165853f04d38cccda834ae9041490d1fa6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAGW2303836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60daf853a168ce3da22858417cdcd53559bbad4b4379251b3eb0dbf174db655. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGI2295996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a3c38cfa4859b6fb47aad2168dda245bac9282fcc8589207c51f1d8a6f097. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAGI2296002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76419189e6584149b617f3594ee60663e21b1f505168a6133565424adf460588. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TCAGI2295999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94907060464150f1dcef5496eb8efa78127b7d24ad5f5785cbb1919fe925b663. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGB2213696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b89c3ff993042dec7089380c6cc97533e2fbcf3ef06c07bf5bc18c8cc20b29. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAGB2213129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954cf93d5ac73a3a5160e5c2279f7e64f37d507abca56ca23876f91b445257bd. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCAGB2213141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ee79da42b47d6c5e795eb3fd63a8a0e37194c8a5c1f26c0ff2e9076eed9d55. 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/TCAFU2134633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c852f990ae3080730516b9469c462949f4e7dceb4429189c1fc528e485f8b3. 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/TCAIK2446345.