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 0xe8dc454388ed1796056b4b620a418fc9efef773318853525958c6b429da5c3e4. 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/4a50d7f0-5bc8-4b89-8ccb-d517d4f581c1.json and https://artists.proofprofile.net/proofs/artist/4a50d7f0-5bc8-4b89-8ccb-d517d4f581c1.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 0x8ad96f6260e0c0e2ef3fdb2fe576e9c686283b71efa215382bccced26c1829d9. 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/QZFYY2117333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb581802a9e2bfc899f3c8cce3141ee5a370ee925531272d96fc0f35df41906f9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:06Z), 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/QZFZ32109883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d2be367d6c8f7cbf979cb63c2b2b45aac91e3f0fc36e1521cacd1c985dc3c2. 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/QZES52135771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadc67f89356164a9569fad981991849b77dcfb80f82bd5f0bf8830480b0028e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6M2192350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16802c56c1db85fadda3c8f920da1a65195d235e23419d9378ac2686e5fc425e. 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/NL3XU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee06cd8446c9daea26979d42cad798a46850461269f39a614e4e6926786c075. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SE5ZV2123901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a53c4c3e7967bf3e2f27c750bb0cdd28a6e8c368e3785c6368b29c1dd63ada. 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/SE5ZV2210101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9177dcfeb4c2033a5b0baa683cc5b0223674c7f6bae9ae284017e4d30cd661bf. 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/NL3XU2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee4b0dbb6df2d1f0052aadf2bfe797849a7707c8fca6afadf30d811d82ce7e5. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN92263295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa487f20493a8616aadf5f64fe2807a527feafb627888ddd24c55d9047cf50f47. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NL3XU2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b4d7522f2ae2142a9fd99dcb6d26370e5e62d4a2431124b168b6b41583ea67. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:17Z), 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/SE5ZV2265501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bc0fbe560d9c48ddb4b4fe367666ea20076c12f9b3206581231a0b52982c48. 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/QZK6K2345673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e73ea2d3e2fcb9b47066b00655ee981ecc168d3ce26e892a1da0b7b74930e43. 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/NL3XU2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2b9773cc0f2ae1b231ba03e5ebba51d961397bb904f1443da71cc0a46a969a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US38Y2307335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e0239c4cf533095f0d942eaa840acec42310d6178a452c31d873689594acd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US38Y2307371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc6ec67a4a06b58135067d6af505d146389589e3d9f9718c4c41e7c37f7aca. 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/NL3XU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc6ec67a4a06b58135067d6af505d146389589e3d9f9718c4c41e7c37f7aca. 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/NL3XU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796f3b477e600db123079351d44bd59c435e703d5b863a3af7c576722a79ca0. 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/NL3XU2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d69c2ad0e816c5a1f0676affe6744c55d8769bc2587249fd697af52e743db0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL3XU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6815c39702c212f1c6539b9328ff100cdfb206dcc94f952303db88ffb21e77. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/NL3XU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732553f981856f275767b4d20280dea3898e5d027c69bc055e01cad2c03b8a77. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/NL3XU2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1526b1333659614214b4e626e535f9495f6b828eb43c76230465c7f134b14fa7. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/NL3XU2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972c720d4b289bf764a7533be6c1dce69b91747dab357009b3d9e9157e4ea918. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL3XU2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f778507bda01e99a17be118dcd10a62370605229862c795e092c4ccf24ec6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NL3XU2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c23debf9a25b97eacaf61fe67473542306f5ea6156661cc59c35320e2294cb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NL3XU2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4c2ea36082a16f503d9db2d2a40260d02226aa48e5526297fac068a9c5c36. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:19Z), 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/NL3XU2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d44b509c009a0376e0e869d84b14222e84ba592ce28dc8676d6ecddea3e854. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL3XU2000011.