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 0xd3a102e0df100582ca790b582b8eb6f7917ee6747a60af1e6bfc211a10e76bc6. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1615cf5-9f26-4128-89e1-447054db87ca.json and https://artists.proofprofile.net/proofs/artist/a1615cf5-9f26-4128-89e1-447054db87ca.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 0x49ed764c8d90fd96556c50ceef55a38e23d5f73a3f44706a51ca8d9a029a4d84. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEUG91500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda27a37ea1f29b711df9904dd3fc13d4dec647a19182be5832c6194bc34cfdd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEUG91500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eef99dcf3cf5116ac57f7b184e3a4a44c1da10e60df9d6a609cf61f93e1fe4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUG91500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599d9fc16a937aef8dd3db4303ab9467a125252e185a5ba8ec3efb90bba623d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUG91500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71258daf779ca75c7978ceeb9f97e0dac0fd6811d826013bcd7492db7eafdb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEUG91500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dedcc8e230b94ce4c0443cd5e5a79469b859ba87df917762598716bda11173. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUG91500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215cbe1d17a85728e9823ed8a7f2171efce10da144727c9a7b7584a6d1162fa3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEUG91500083.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc60ba67ca5b7c84ad46ad93ba48649fdf55332eb7437dc694efba2f66640e9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEUG91500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fcaf944ef1a97242a074210585ba33e108360ffd25746a6bfb76aa309a321a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEUG91500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ec28ab38f002b194bed065100ec720c791113e8fd94455abee90027430c33. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEUG91500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed97a7f72a33fdc7d54fcdaab762534aa90fb3e7280f3fe7eaf0ddf8ac5db6b5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:06Z), 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/DEUG91900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b2b10cfc600318fd922f0fb6ab2fb975d0c0113efd700950713693e93c85c8. 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/DEZ651348154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b55c0ddddaadbde858ed371894525a16950ca3ec6058b89ed42e4c3b5b006. 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/DEQ022012949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec049c80774904e5960ce24e1b1566c0c1f8351d5e5a4b8c73eda3eed31349f. 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/DEQ022012952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8874647dbd61bec2cc44a704ff3412c26ded06788fb5353ee4dff02e784ed. 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/DEQ021807795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc09af82257e43861bb72f95a04324692a3a2cc263e40d03eeff22d8849ec126. 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/DEQ021807800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b00389ad1ab78dd177cd86978e23e2b590f58a72ab208aa56374216f1161ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022012422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c550c7aca2d2b027dc2584a2f52dc3c922f32fe4838ecd1b624e8a42174c26d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:27Z), 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/DEQ021807794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd438d1a2baf1effaad9483d066d28e7b42f5b5291de29a3fbccff1423bfe516e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEQ022012946.