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 0x5db0fb1c755b466f485d25b13b057060b49b15f4800117cbe6d319b308c5b6ab. 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/746ef185-ad7b-4137-85be-b12d29f96072.json and https://artists.proofprofile.net/proofs/artist/746ef185-ad7b-4137-85be-b12d29f96072.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 0x15955f92fe096783d6cd358de29d04124ba84afa87c0426ad7f5c3652707c2ff. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:24:52Z), 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/HUA251418816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e3939a04480ed166f8d98f0a4a0f61b35f7b4bec1be9d188aeaf6a94d67ed4. 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/HUA251766001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06981be1d5b806d09ed50b7e0a4c689e93217e992a104ef715fde77fe8873980. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/HUA251766002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf433d3340b0ea9dfdd962750d006593a6c09d80ca190c1f62849514f6e5c849d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/HUA251766004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eca7616d9b5c85ce94352e4bb4b4de9f3d622f742f8af86810fdaa0625efdd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HUA251766005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5012da774489c8da30815168a0e53f05e9c1b4cff518f087c031056ef6db9c6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:22Z), 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/HUA251766006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110cf38b4a73636f9282d301c2e6d9bd03efc7207bdcbb49cd3f274b78680833. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/HUA251766008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02531cf5968d7905a6db35aee622d7fae0cd5f0866415f4a7e6245cc03d2044d. 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/HUA251775313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8e9327b33fa3e35b6349bf47248dfde5adcb06ca3ef816b7f0142a7913757e. 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/HUA251775309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c4f85d97aa4134b5efbe7b3cf048b7044fa02ad7c8653e325a1307b229fea9. 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/HUA253794105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c1dc496e0bbfdb78c07ede9cc5e8b37c13cf6924830ac15793e08eed5af1b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA251417601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f6e815b0feafe7941779eb6597f8f03adddbfd1548b675318b2c31b5f2ebf. 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/HUA251417602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa059d1c6653b1a2a4ca0d1cabb24d23112e189880d8d7ab311ee6b274043a6d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA251417603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61eec0473bce7594cd5e9a32dcf7322de25704e66a7afa6f860350db3c774b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA251417604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa2d1c2b377ff5bc59254f7a60c73b017055693ccd85a8d41c5231beafaa5f9. 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/HUA251417605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe605d862643021a292f61f571e256ade662bbbc6bf21c634c15c26d8fec6c7f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA251417606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34bfb0564594a925d2f999c6989f9e84e74cba08b7173013d6f7ef6a4d791a6. 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/HUA251417607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25b2ac963b4c35bb81a3311e2162e6e2ec779dd300cf99048dacb95a7a3299. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA251417609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571f39894df7fb4a2fab43626172de52a7b2fc7b14c2e0a6377d675f09b5c977. 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/HUA251417610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b712423ddbf253e4bb54e99b631c7b8e8b8992f545b4533900fe4d2d038f9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HUA251775312.
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 0x490592e4d10ca8872e0350e02ec530c454daae988b439108e0515cafd0e22ca6. 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/HUA251775301.