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 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 0x5ca4d629153298fab93fd002c1a29276227857f9b918393875899b601014461d. 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/1e0d9782-67d5-4d2a-8f34-5a112d7a9817.json and https://artists.proofprofile.net/proofs/artist/1e0d9782-67d5-4d2a-8f34-5a112d7a9817.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 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 0xeee1e28dff0f4e9552ebd9815a1b83a3bb88383c88ed49e633491dacaa426f05. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US3DF2257255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcdbd820b880033ebf9958a916a234746a687ea69e3576b843a059aae63c6f0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3DF2257252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00561950afc13d753aab136b103d332a5c97a79c976f4e10bf0e028ede9c9f88. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US3DF2257250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342adfafa77d151a734837c201e5c3d97b62dbc2b2edd684aae5e37a2ff5ba13. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US3DF2257249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f1308567bc8a15a1c02a0f1292bfb2abf200fad57de8983844880d3f13f2c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2222430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd34f435a201c7b455c4feb1b02421e64861ff3a8dcb1b92fc9dd6ba9a6cbe8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKADG2200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a04aac7f64e22fd0341ca6b0a4e3478ff20cfb8aedd42d13e99cb2be5134d5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DKADG2200469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eca5ecb7e235fb987a3b6dd7d989ffc9c0c01a78e884c270e47294124c834b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DKADG2200457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef9f63cadeb4669b4e2b7e1d1e7c744bb764cfa0bcb7a8db47a2eaa57c6da0b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKADG2200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1528b9e6c3d0068d895f1f24c3fde238a2dca509c4379b8b39e64ad86a1fd6f3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DKADG2200474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbfaf67c6eb026b4fd80f245ec0bba312f7f7fa720c03140052987274237aac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKADG2200476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf757b9a1e06e4db348507d1ab2e6a3fdcc1ab1baa286fcee7bbc0e7c58ba89cc. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZES62064083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02925fad00696f3ab9449d62b99f294290be528702398dfa1cd639cd458f3d3. 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/QZES62064084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284418dcfad0fc50f7aa644e6e16a3ce9f329cf80346e7b1dc13cac7221be23. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES62064085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b88310518db9cda70c1332f0898c275a7b1ec24eda9555ece3300c0743366db. 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/QZES62064086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ed5611a122ca0780e7da1ca3d72c083c73f503cc5c6bdb034a12f39952407. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES62064087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6ba82762a3f3dada250da46559f670eb04e841269df36e177e1e0f26eb444c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES62064088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44ad6b1666db5e507edd9f70639f27336ff49dc6f2f1c8bbb79af5dbb46230. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62064089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aea1c66835f6c39650b711c371feadea88b888ae9283eee52fe5806c582ad4. 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/QZES62064090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4fd71ecf8c0092be27748c964eb71977a2d45f9b8d9a058d83d29fd86ecaa1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES62064091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07912603c75095019d1e9140f079a8b9c4cd13382a227a57d0d7f537a8e939c9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES62064092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67add09c0948a26c3712f07ceda6e1a5c6653971a772ea7c9fb61c9d7bf110ed. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZES62064093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ba51c2af10d22385995dad5f42153cd7f1198ee4d323b4b61bdf7c4abbe41. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZES62064094.