thumb|upright=0.5|The ankh has a T-shape topped by a droplet-shaped loop. The ankh or key of life is an ancient Egyptian hieroglyphic symbol used to represent the word for "life" and, by extension, as
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 0x16b981be44eabab0a66a42286cbf7c5956ec7efaf0fc478278c82333b0954b48. 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/b014a106-f068-45ef-a8c1-ba5e13a23d9f.json and https://artists.proofprofile.net/proofs/artist/b014a106-f068-45ef-a8c1-ba5e13a23d9f.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 0xdd6c84d625c5b5f84610cbb75c37572aa6aa541233a7e6d5c02c4dd8e1d47001. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:54Z), 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/QZK6L2227749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec676343a88617bddbd3687b3ed5a5745b0b31ce167c400d2c5cf71fbe293379. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:31Z), 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/QZHN52316502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26abec7b265f95e0646f2aa1bdb9e679ccdab9e956933e01d08ab67351a9dcc2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:47:33Z), 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/QZMEM2312246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf74d8e9fba0b05edbeca9046bd07a75fdb2672a2e75ef08ee0e73b93ba23c6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZHN42475523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb759a397dc4d79070416e5dcd6ee3da98b0cda9cd9f16a641a3747fa6553452a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:51:38Z), 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/QZTB82469332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e2306561f74b883cfbf891b40127b77f0016740a76f0a089cb4fc8266bdfc. 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/QZHN52548431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6e69141de8f74334177df431f3ec2bcf76e72e60dff41ebe072bd6ec12df8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZHN52548433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4c0e78d40b662adbe07a757288d156a9dd259d7d77873bf29b2171d43e46ea. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZHN52548434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5c9aa3ad0da03733f8423f307ae11d9cbeb86586aa206f4b876b0079a46b68. 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/QZHN52548435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f000bc38d9af291df44ad8d72f44925b7e9ef5a48768c16f66706482deab7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:29Z), 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/QZHN52548437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b06e4bd8c54e5a4b0d6111b11a1ba2f28f1cef4e191ed78681eb9338456777. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZTB92528429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6fd2128d652f9f45605a0c963a2d3f4501ce3e1e26110ff84485a6e17adf79. 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/QZZ7K2519448.