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 0xc2dbc87b7d432b7276adac66dd94acce1b8f811eea6d73c04114bd15577fda0e. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3201d4f8-f759-407e-a215-6664db85487c.json and https://artists.proofprofile.net/proofs/artist/3201d4f8-f759-407e-a215-6664db85487c.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 0x6eeb8d52bdfed0dfcd2f1f7bbdd3576cfdfe10423228c1a65e2645282508f442. 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/QMDF61501533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb886cf66e4e9c8edb07f105f9c81c6fe044929bc3707cf633c4d07dec74b0f1e. 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/QMDF61501545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d64d07f0d1476cebab7062cc6460eaf5f0d4f19cf5f4d383db220c1a7fe6b0. 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/QMDF61501548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2121ac85fcd3df9f44fe251d3721820c87bdd6543c589371bcd1a412502302. 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/QMDF61501547.
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 0x560ac66bda36a0c79a3c34c71ef6db78c66c4683e08a50541be4b51e146b53e1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMDF61501562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5f74fa9649d22ebc7bb00b39dce6f51e71ba1c0936c45ef928aa792928897. 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/QMDF61501563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c1f1e4caffa3ae44ca4a3fa2756391a187683c29511d6ceea9f5abd11c82d. 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/QMDF61501565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e9527af4f141e46d661f37b9e8a0fd81b06c894bf95957a58426ab94816651. 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/QMDF61501566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebed6f574d56560eeca43da92aae6057d4038600c27868aa117dbe715e1de0ba. 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/QMDF61501572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7513e5c6257a99eb4ed6bf48c7feadee652434dfc16d1ae84eea06f1b9f6dcd2. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QMDF61501561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba93c17dc4cf5de6152abb0e89c8ccf351a80109cbfb0aa740444bad2d653a8. 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/QMDF61501553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89fa7c456839857461f8424a659d50c40167fc7bf7f6fbcb60c016e38f450d4. 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/QMDF61501556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dbfae43ae06f7399e773605d2827b0d63f9ef84aa978f3f56a8ff34d4da862. 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/QMDF61501557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b9b7ddc82559961ce322e306514d8ac6d9d532832f269977a40fb1e513ca3. 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/QZ22B1805657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07edecc6cf41f0f6b74a507985045b013013de333b2aaba1ed7765a88aa9df44. 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/QZ22B1805660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cda1e3bf44e75c338cef143b9c3923f38026a242281a96265d2b0d75833c4b1. 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/QZ22B1805663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b2a341bb164afbab6a647d2ce1a38d42c27718238312d6296a2ac60535ffc. 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/QZ22B1805664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c549769ee49c8f56fc15e95597ab54f674d317e34156f6c8b9774368e0c413e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ22B1805659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9490e41992efd0f6e4ee65c45a8261ff457ea9309816c7ad87ee795a1bba94. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZ22B1805662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c6e1fbaf826c8a0a618e03897501ab06c815206c5f0931936a867d2d26dff. 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/QMDF61501420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3c0ec1a99c426e96c8149b6c13024e8fcc265335d946e9a3869a1d8297bec2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMDF61501422.