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 0x6b3dbb8135b0bf5a53f3fd3c77cd0dcfe91f9f34808fe489587136f8c678f292. 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/fc0826d3-3822-4b1a-99b8-4c5889548752.json and https://artists.proofprofile.net/proofs/artist/fc0826d3-3822-4b1a-99b8-4c5889548752.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 0x37c7412d1cae72a7da23ed06b98b2e67de90d0f2407ddeac7ddc9d832f5d9c8d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:00Z), 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/DGA092311962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1339bad166af6c1cb4fe5e92a53a847785611498eb2faa8accaa1e348b8680d4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:45:15Z), 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/US3DF1103551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5124cfbc4edfa501a052eb8e0ef0019ee398cb4adf004e29e0a4d05df48ae4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3DF1103495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f9bc8cd7f7232e62b3395ebaf46cfbffdc9dd735d4aaab8795dd078419ed5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:34Z), 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/US3DF1103590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4400368044b2eda5e8393ac072077f6e8dad81b2664de3c1e8aec1bbe959c4c. 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/US3DF1103540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfeb57824d26f5ae66a0d2a9bf43207334bdf629bcd75b68eb84a7b3ab1c088. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US3DF1103543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e9ed7d0c33a20bf5c4c4dc9dd65ffe1c982517b55bab9bae77d99ad611623. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF1103548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40522cf7cc7e8f0bb1ccf6073faa3142d7bf82d88441fbe066d36f332eb76b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1103600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b63fa7c808c7397fbef996d8da96a6e9f5bcb1d54432ca6a3a0ba0630eca5f9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:20Z), 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/US3DF1103580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f402999a0981e5e336cedb7f53e37b69feee657a641d04764cf79a7af7463. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1103584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92f331d65f1e91e65f90e3a5255401e17fece3ac5687d78cb4045de57f97903. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/DGA082322022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f720a3f28c94d3779e6b1eeb13a4b11f830a03e952273f3e76fa792dcdacf05. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US3DF1121143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2bd89bba5cd48a5d8b11aff30d783f3ed4cd8ffb774685385c8597dcdac58. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/US3DF1121121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe39508b67195bae35e1829579299a26bef7334dd128095f5cfe59cf3bfd4a6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF1121122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfc8d3a5ad3c367066079cc751176c7aeb93f73f2d5af3cacfae367ca9aa674. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US3DF1121123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfc8d3a5ad3c367066079cc751176c7aeb93f73f2d5af3cacfae367ca9aa674. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:48Z), 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/US3DF1121123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f720a3f28c94d3779e6b1eeb13a4b11f830a03e952273f3e76fa792dcdacf05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF1121143.