thumb|right|280 px|An airlock on board Space Shuttle Atlantis An airlock is a room or compartment which permits passage between environments of differing atmospheric pressure or composition, while mi
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 0x3c8f4b33955bfcacbef05398d184fea03c84422ebedf7b0a3076a533e24b0bd6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c397b09-79e5-4940-8428-a1295954d0e6.json and https://artists.proofprofile.net/proofs/artist/8c397b09-79e5-4940-8428-a1295954d0e6.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 0xe76c56b7055e5eb782113a3ef7850593176cadeaac25672962aeaba5f3f4749f. 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/USEPW0600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39474f53c7592d340ad0fcb0061ed5fc3014d7cf64d60383b49df39335e5071c. 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/USEPW0600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497c1e6a02bf7c000bb248c779429bcfbb4728ff027b34fb7aabb3b7368454d. 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/GBBTF0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7a1bfd91fb888dfffffee047367eb4812471169675acf331892ef64c41c7d. 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/GBBTF0300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e72f58ff5647bd8591d81f803a29864cacdeb586487e7cfeaf7ca5c60539ffc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBBTF0300282.
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 0x4744103602b3f7412560e7ff9701b7c8791dd35f858429ad58cf776798689518. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBBTF0300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b54d4ff722808e24e2a1188d3cb802a440a1305fe9f1c361f36d7301471d9b1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBBTF0300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea73c68939cf26c73767dad03237adefa0cf85217e5b1db7e4a8c501e09c46. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBBTF0300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead9aae199727731ba7ff0b98a31f0da77c347c385b12ab3494674f46b3038fe. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBBTF0300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ca0a9e35d530c6448b142be40c68bcf18131ec527e5c5c1c52a2475b82da58. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBBTF0300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706db4cab44da138f6dded973f75e02e82ca262acb4d8b7bc3082d2359398ae. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBBTF0300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87a874a8b60264777ef679109864f0e2082fcbec91f17bd2a9d532469e170c1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USWR30910127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2b9d1c491908f64aacb5192a01d91d7af91396c5194582c876186dd8c9eb3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWR30910128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694011e1517fd57d0a044aa1d00118b1b6b3473e01c139d578a39073a7dc318. 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/USWR30910129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0b0f39a918683ff42e9a174e8e00f94c25d658e793055a28164c7c44841b6. 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/USWR30910131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2822b6d101ad3523c6de04c9efb58556d161b6c5ea963baccf27206196ec1e61. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:30:48Z), 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/USWR30910132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722d9c4cf0344c5a638a145d3ec19db85acc97989a7acb12938712056ce63605. 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/USWR30910134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee74bd7e983b51d6ca338a2ba35b1c34b0c0364c2d7cdaf1da5b0ad3ad44ff. 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/USWR30910136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c2a0cbe7d7c331bcd2d62c34b35535f686b94dc8c0a763f47d1f7fe9d9cd6. 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/USWR30910139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845cf55c2abc24b8e32239bd72c8cc5bf3f766bee9305cfcd03b6e6c972f8d6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USWR30910130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2fe7887434732a2dedbca299a0493131f750b7eeec79ab4113549f653598f9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USWR30910133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5576d24eaeddb7f28904e749dfae2620caa3b30615e4df51a8466717ee0b7a2. 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/USWR30910135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c89ac6447370d12a447c95cc74a7ff2b9798d09f11743f2dd4922c680a2523. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USWR30910137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbd19b61a0010246dd0f9a3fb1c4c55bb46d21008af2493df38938c6482dfba. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USWR30910138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf172b02f1f02c472c76e438d06f9486dd96a51fe0581845162568cc3c92ef. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USWR30910140.