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 0xf4617ebc42b58169428799971ce232f0ba8b60d08340a0972bb5c0e843c622b1. 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/11857ea8-68fb-49ca-b145-4c90eb0a33a6.json and https://artists.proofprofile.net/proofs/artist/11857ea8-68fb-49ca-b145-4c90eb0a33a6.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 0x680745e18ac3dc6bed9ce75696cff1e7fba9b8105f9a67dae4f4b0c8a28d3b53. 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/QZES51960039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74ead60c79d46dd951d322f74cfdace7fd7f702b8cbeaec27ef8ad514460819. 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/QZFZ41964498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0480b2b613de205d422f96c223644df4127983465d683e412bfc7456258e519. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAFF2084966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eeda727bf3c7fa612d69666f9cf306654a5f4183f9879500c250eb36910c69. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAFF2084977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fbb918bf43b7662420e7e85bee72b0a84d0a01ff2ee40df151955b5b0ef513. 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/FIWMA2200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fb907d5d9f5cdc554570d75c51c41cd38ffc26ae0f7e492fe1f782a5a42e3c. 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/FIWMA2300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fb907d5d9f5cdc554570d75c51c41cd38ffc26ae0f7e492fe1f782a5a42e3c. 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/FIWMA2300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d8617501779f9e2021d6faa936269dcb50a9a2c6070ea03f83418a79747a6. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FIWMA2300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb9a8a6f7511b808ea361d59bf15960131c90d929db549549e725ffdbc6af3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FIWMA2300526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e5b433c639a171c65977af0503b0847d33b5d01d376b8c1d2d57d4dc1fff9. 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/QZPLR2471956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4125ac6b22446366f783ac33bafb664f6e05a22fdc4777f3396a8cb29bfcc43b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFK2479114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc894756375e663287b5e5a9319c3c795b24efc27c9a051bed8c55749ece1edd3. 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/QZZ7L2487368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0918aa77cd6ef81372e73fab77b4e937227b99309fc1cdbb996a52323b068. 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/EEOY32300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd25906ec1d71d37da6ba1e6513b7d32b2049b617ceef910f5ad2e2ab8a526cf. 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/FIBAR2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665f5003b448692645b7a5a5837342a9d38285a0615f2a6273e084b153871ae. 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/QZTAT2296207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050883cabfe3ede6be13a6ec2a755f92c6153df66cbc691dc9f56497e57ca5f3. 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/QZFZ72311410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9433f048eeaaf8205c56c08e159e617f7ec0f7e5e84f10be76251ceec5aa4. 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/QZK6F2159589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93858df6216939726e6012f64c8f97c51d8783ec98bfb7371e73d7763f040a. 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/FIWMA2400073.