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 0xc2c4374f06f215f118c653c7a4d739217058f0726899481153ccc22c57925e76. 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/74d41b16-27fd-40e1-aff3-f9602fa895fc.json and https://artists.proofprofile.net/proofs/artist/74d41b16-27fd-40e1-aff3-f9602fa895fc.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 0x1e59024b5c24d2de4470cc8cbf64548147f31d3bf372b5d3e407b09f8df8810b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F92542222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134c64b6236e0f36f211bbf800ba0708e3fec1c6ba4d2bc3e24d429c824ce54. 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/QT3F92542223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc271f49d6a95b176118dd485172a2f47f9eacd4a29f75b36f6ec95fbefd4f34f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:08Z), 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/QT3F92542224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba3e8dd6ac3890bbca15171bb134662a57e308526b1fbc4f11f6cb7ebe7fd87. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3F92542225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618303fb2c7138d8e844a6843094a22c9dfc8579c88afce447434b23dba5428d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT3F92542226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe851de6f6bb5b1e33d2794d5d7441808e70f1fa851e75a6ad3e45304290dd229. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QT3F92542227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fdb1c07934955e8811fcfe25adab33525d6e3f43c97133e70259149f773b4d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3F92542228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c75b6ddd1b8e755ef6ea8c41eb98f58f3bb863f8b7eb036b40dffd7817470c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QT3F92542229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdfc912bd38d0bb1049a9920ea10aed93ad1bb51e483b9dbfbe634df3e3ec33. 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/QT3F92542230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6234665cf189066e6033acfb58a343b0da30a85addc355052ddf1681bacbb044. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F92542231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba105e77e7827ffa25e86f4546f180657e78d6703698b91a3ec497d831887b0a. 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/QT3F92542232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db2812ec7433e6217c1616d96c49a5c974e0246c7d8498c0ef6d3bb39e7b0c3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F92542233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700fdb6940281b4a224bbaf917e2f4a65e25966394338ebc3b5f226be47198af. 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/QT3F92542234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b872dbfab3c3de1e782dab3d8073006060c602e1aeb913512e0ccbbc33dfa. 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/QT3F92542235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43457284b3ea7cc9d3ee8955bb2db6f74652b98a32be0292ce282faf9bd8a986. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:49Z), 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/QT3F92542236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3be12d75c27222f65199bd55821abe130e5674c2397b454a3e33527f99ced9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F92542237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cfd53611b93ab3933d4448fd93c1879a628cd17ca54c39bf6210435cf2f223. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:10Z), 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/QT3F92542238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aabca1209e1b3610c88504a2c515a948c1e71643965832436519f83f36de18. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F92542239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06675002344c0f2c3580b00f8282991ddd8ac7ab21acc1a95991c61195b23c47. 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/QT3F92542240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc26d7808b8fc983f0b470e6b6d78431287e47dc7fc49de2cf252dea5bb6144. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:52Z), 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/QT3F92542241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a80c42d716846f1bb156a08b5bc5259926e5d2f40b674d5157487ab0e3ed66. 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/QT3F92542242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d98d935d71e0532ae5ccbc6c501e62f68aa4a5452d4a49cb8211c568c8a86d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:04:44Z), 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/QT3F92542243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d207a9980acca943f2632f67ef3301a8f23597081fb5c96b6b634a44b6fcf06. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F92542244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e50d32edb5b4478f0f2e6387a565aaa90d9e3fec9ca9701ea4f1fbdb029fa3a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F92542245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc74863269af2a82075a6a9ce629975cab40401a795340cd718bc90a84ac5455. 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/QT3F92542246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afca630c5dd7696c31815f15adf909dcf4d092b9edcc4c8941a313603da92c2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:53Z), 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/QT3F92542247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d908aeab5e82bb502e24e99e43ecdf8c02f3e79201224b4c3ca94cb4f4a0ed. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F92542248.