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 0xf61a7c4f05c06c515e5755ddb218a91b26fd4ad885a6ebfcc778957a6acfbd71. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caf255c6-51ea-43f6-a440-081178f71312.json and https://artists.proofprofile.net/proofs/artist/caf255c6-51ea-43f6-a440-081178f71312.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 0x26b5f96363732cd3c76f861164ed774cd8fb03d3f3f349bfe21993cb01194e1b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZL382284355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e74b6b5e599f74b168b05151fdd58f5595fab7de132164098688d3ad457c805. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNMU2250545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bacae050b0b380f7641f9f6ffeb07f1601b6e58f72f6e20bf319e5d62399a6. 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/QZNN22203118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde259f7095da3038da3100f20e0e62f427e85e0834ac767a37cbd3cec7f2f6a6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNN22203119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69e8bba095fdb01837826c81d3fcedc6fc91bf802a92d2dab0c45701ffa101. 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/QZLL92308469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da7482c538b4895081a1f32b268744718646df50ff2230c7a10056d52c69b47. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:19Z), 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/QZMEV2378756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f12e3b82c4735fd90b86c80a281e34b1631af76a3cfbc802be647ea20eed96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZY2N2397159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6147ce0f5469ed94246ed2889d41a2f148e4cdc317ecaab59ea0197164486c81. 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/QZJG52454902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4f8d19433e91d57ffaa0e8a263ef3af1de3f5ba1c4e01830aaab7c32b941f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:24Z), 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/QZJG52454904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040483089767bc14a5586cf8a9acb96076834edc766bc7c4ba9f2b78b617c70. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZL382476339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c0a582eda7da04a16e85993a174823fda0c187b0bf7bf10d014414929b6a2b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZLL92435652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d1d92a26bf5553dc2afac7c0d416744b2cba73de66643daf39143719f6be8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNB82493887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee048640ef9a8f669178d527b7d794284de1a360ef42919447aa90714e2962d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNB82495871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065071d3d4105a43dffd661057c91e116f785d1f152649524911f2f394fe95cd. 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/QZLL92585145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7f2a0d7831470470bcde593211a2df8004c5bc78cf81a6c8e4aaf6076781ad. 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/QZLL92585146.