frame|right|Diagram showing climatic zone corresponding with those suggested by Aristotle. The climes (singular clime; also clima, plural climata, from Greek κλίμα klima, plural κλίματα klimata, me
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 0xfe8719f331f98b4c26b44251747a6c8a5ad9bf3d871fa74ef00252845cbcd21d. 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/036cbe88-3218-4265-9bfe-a8de8fc49769.json and https://artists.proofprofile.net/proofs/artist/036cbe88-3218-4265-9bfe-a8de8fc49769.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 0xfeeecadff81757aef3dfda617e1fd53243a5a8afcc2a7173ceb5b5f84a08730c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:53Z), 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/QZTAU2360997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b126393088d263a40ea34578bee0b68fcd52526d31f6abc29879920b98301. 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/QZTAU2396073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a6c26323cc2c698f079859b9fd16cee0e82c65f60d832e7f9851e9ec55d7e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:09Z), 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/QZTB22358619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4c0858634311be7fae03982bafca746af5b0ab52694b46ede46f6c187fa33c. 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/QZTB72392920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b81ec7f871ac8a6073529b4887a490c9d579922c36ed9935b19e6c4d4b491fb. 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/QZTBC2380998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1498da71c9d93b0378225629feb7112cbe919c121b668165bb8cbd5e14f51. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTBF2394860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0100aa58842cf3b982e4cbae05f085135dbb0b0252c157ad6316eed78baef48a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2494836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a659755511a1c8100216255e3d5cba55d344ce3e55add0c859d0986a3e289. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ72401922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19998fc12669e9a458b4ffd52926077d87bf3f76acb25bffa8d9d6a32edb4b9. 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/QZHN32473120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0efdb88f727b7461b972e0a5044e93fc1ca076511f2e507e683a65af87dd0b0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2464521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66841f4ce17dbb93bf6536660d6c107128541cfed341cab4f9c9fdc909054da. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWT2496659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93477a7446cabf2499bca941e62f86673d26f45bdc8b807f17c2bc792f74e5a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:57Z), 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/QZNWX2400743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5ddea08cc72204c6e4571c75ab00b3775bc3b6176d67c3f9d2825f24b17c3. 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/QZTB72451012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e3ea3d10b5bbc006c1b1ab356296a7d79048b9921a1857a1bb80095eadf52. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWFU2464374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828b5ae11aa20ef8a755215e0d3849cdb9d96e00a0cd77f5bc2bc045e0ebc942. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7L2465822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ec26c33e9be254980d391a64591e673b54551a1de21a8e32cbcf5cac278d0b. 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/QZTB42565933.