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 0x0c22422b1e25ec11f4003ef10c42d62636b33480416a3ef60dccf3ed9e2cd2f9. 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/931e3def-a4f8-45c0-8135-1cfb77feed62.json and https://artists.proofprofile.net/proofs/artist/931e3def-a4f8-45c0-8135-1cfb77feed62.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 0x8ea230f116011e06db9881d14281952009305517db935abc758bb8a953980b61. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4DW1677876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4ea168a65236a0b91dc72350b232bcaab5a73522c39f4dfd719fc1c297a47. 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/QM4DW1677873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7091cd8afef2d232b7494baec82cb13bcdb8c0ffc266cb7cffd5e7147bb601. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4DW1677874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989371bb912f1b8b45bf5d9986cdedb7936a68569b66c3e79e8a24afd4d11351. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM4DW1677875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bba7bed61f8b80c173632f65bbbdb536073c9c6e2b3a3adbe5b8c163d657d8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZA751842503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201a7ff40f16738b9d447e4cb1cf0a8f842577a4d6c1ddfa3d5579701d2d7a1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZA751842505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb355f6462df7609d522705a9d24b1121a57d73e25a0d2528a67bd727566438c7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CZA751842507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334b651972a4f6a5cb995dd0148d693be28b591bd4468d87f1c42c9b2ec136da. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CZA751842508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c96998807ff699fb13dcea734ca65da636431d22fb2eeb831a1308e3d5f59. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZA751842509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c8025dc773c4dd5dfadc532d0c41a809811aa1739e1804d241b675775269e4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZCW72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8001f800066ee325b12005b62d220aaf38d934cad6893382097777befa216c32. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CZCW72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d27abfe00f36fc9f96f90a567f36c6ad4932e55ed48019b8bd24699b420eb. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CZCW72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5343fc3b6d557c17debc58ed7d14b76d251ceb27b6987d26636fa1acb6d00924. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CZCW72200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb14f27546cc11118d273cf9e6999cb49062727c0b8d92ba343ac940b623c3c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZCW72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb7ebb313ca6696c506b54fa601e0407df31254626651a23e584cf4fb76ffc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZCW72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78623fa839ccd0fe31aded83d334b236fec453e932f654c2c18738599c3eb05b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:38:01Z), 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/CZCW72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c8d5e9a4ed84305ad71ee15c172253205535e948883de697524fe341f085b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZCW72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c8d5e9a4ed84305ad71ee15c172253205535e948883de697524fe341f085b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZCW72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a00c22057cb812686e6f910f7f31692fa5e01c531005e85091434af1abeeb. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:33Z), 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/CZCW72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8874efefeaeea5615ae146094de4107f19a117712f664ca7d9564a73407685c. 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/CZCW72500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b8241a0564a153308e7594ae608760d9d3c75ac7a15f40d110eaa226feb66. 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/CZCW72500005.