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 0xddb307a7c1b069b1208365702869cb9913bc102a807e417062fc369c8f6ea496. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23c1ba3f-eadb-4f4f-9f3d-0ebfdc6740d4.json and https://artists.proofprofile.net/proofs/artist/23c1ba3f-eadb-4f4f-9f3d-0ebfdc6740d4.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 0x8b714816f1b909bafa14718d2bf2f9b0ab31cf1d17a332cd57a121f9e21d4631. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMZ92503139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66b65a847362f2d348a979296b48852f4554cdf11f4a73ea8528e8ee04209ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92503108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc6b168f86ebb30fb1df84bd581aeffc8b3ff91f9b14b3787299ccc24bf3553. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMZ92503136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50316084a53b0ec812199d364dba110c53354f4a24200cf92f143ea43ee4f389. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMZ92503067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbb4275ef505fcc32a1735016ddf246056ab57f276623c2fdab2ac029dba556. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLS2592890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d53dfa3433029c7f8fbf5bddb7796dc226ca5adef51871f951b4e8cf33066a0. 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/QZMZ92506055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed919dbe977dda696a610b486a4ded6ba23580450bce7373aa4d422aebe28c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMZ92533812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc197e8549777c9390796d487c1b5b9d8ca8021b9db8c99dc7db9747487b3f067. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZMZ92534078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa634cec9db3bb77cb6d66b73fed246b648d6cc2381250793f36970325d45aa88. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZMZ92550362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4153c3f13fa0188e2f9d4278372a15005e860886597a438b5f5b99c3e5c3f8cb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:44:58Z), 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/QZMZ92533841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ecaf9bd3fb3a35ce30aef61024bcf454cd976217c762536b4234decb9c4f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMZ92533816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9f5a2a36f5603e67836bffee17ca30c16cd148087e93097eeddb63c41da834. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMZ92533843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c6dc6223fafa9ae6051359736c92df012a7ee20157c3485d6a8bc26300a113. 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/QZTB22513870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf784ddb40dcbab5ec909fce71efe8bdbb40b59601e1d3471cad368ef251deab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB22542206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6931e9f7d8e894ff5fa3c1620e37a9d7e1604dc189b8d456d7ef3b8b5e79617. 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/QZTB22517082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defa684d0f706b878ecee5931803f3ceb6733a22dd933a8472951d7e2df2e18. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB22555401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4ed36b6f5e4decdabbdd1649e813a6935fad4bfdcae80aa3f84a062c88239. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB22557887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec7086a60bbe01541ec7cdd7124754fee7b45625858754bf4eb6c8aef2f5c6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB22519353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25c67bb7ab2b907aeb5b0414afce1efa5ed46b8b7d628edd345ac14e6d3792. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB22544103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4ed36b6f5e4decdabbdd1649e813a6935fad4bfdcae80aa3f84a062c88239. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB22557887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25c67bb7ab2b907aeb5b0414afce1efa5ed46b8b7d628edd345ac14e6d3792. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB22544103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0bce08423859978e9ec39ebff69349d7607fad6f402df0417eb951997ad1d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTB22555396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec7086a60bbe01541ec7cdd7124754fee7b45625858754bf4eb6c8aef2f5c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB22519353.