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 0xd6ea658b473e6860543e8c5351864df6dde74b70420805795f62d59f06f91de5. 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/f97f3acf-0c45-48ed-9c06-7f8ce5041fbf.json and https://artists.proofprofile.net/proofs/artist/f97f3acf-0c45-48ed-9c06-7f8ce5041fbf.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 0xfcc6c306ffcf92588987c113c6ac25f0b694a145bb6eb899d4c7d15391be1deb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHC2390417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39638302479b593370070123a348f6a3af24fccc7c3b4c3935b83b72523c0eb5. 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/TCAHC2390430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53954d7d5a2ca62a4b33aa2e27008d9d9a6e6fe0f9945f6bfa2bbec69f75be1c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:11:18Z), 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/TCAHC2390441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a1f9d04a9667d42bb4b353120d9576365ed68d66a77f70486da19f08d18e73. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:24Z), 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/TCAHC2390478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70106f044266a0b739219e53400a010d0f6cbbc30ace4fd6ccf73b93d1d97516. 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/TCAGZ2330306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f78d96fc951d00b8311fb1cb685686d28e4b590a4bac95f81c844a5dadf655. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:47Z), 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/TCAGZ2351642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa8a63bb08b7e6a1a4beda21de21c47a792844c48d59f55af4cc5271971577c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAIF2435282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e0f83b23fc3e65d51b6dd903acbbdf8773b889f3a08fe8256e41af8c771a49. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIQ2470416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f91f9a75dcdb5f17a46b7db32f1e5a1b9fd43c4a278c999b2df798199daaba5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIP2449692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c5bd7c561e9c949bec4d3bf3f18cdf6fd968d2c320f8122a3cd84dfa3fe82. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:32Z), 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/TCAIT2404611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b78502b97d014813dacd99428ded74b48f1fbe50cd8e2077ad41baac2d42a44. 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/TCAJD2472702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce0999c282d7cc48ac4bca3a8abf09f8f46817ae18217cf085c748735513913. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJD2472778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e6a50eb5bf78e93a9bdc431fd4554a7bfc2aa772d93dd93d2a3ae3c52ae88. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJD2472792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef98b4c2b4a8dcc0510e1f80af3742813c4030a329b604367b9e6780e8595b7. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJD2472810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2060cda903fcc754067ebde80293ea9da8116c4290ea936d1e31c56cae1d3a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJD2472833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3734e9b9a8b394695b6721da5d5e880e9bb1e1d90846f92d464c360ac17920. 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/TCAJE2472837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0710eec235d3d09fde13e290560c32b4e68cb6ce348bf51458a491b353ede8b5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:27Z), 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/TCAJD2472856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fb259366457849fd21cccf2b86866e93b6e93a391eddb6612b06bffccd60a9. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJD2472865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c9cad598235d55b523a5cf71f055cfa650701266c0dbbf437944b9d987175a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAJD2472918.