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 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 0xbf47047af2a5e17f7d942b60b28718241df65ea02e4f4d252cb0a5573554f59a. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6839a4d-ac29-46b9-9204-7c5d4049b48c.json and https://artists.proofprofile.net/proofs/artist/f6839a4d-ac29-46b9-9204-7c5d4049b48c.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 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 0xeedfff6dd5e96f2900c048a3174e2a2515d456326ab0081e2cbccd145badb22b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLFP2533049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ea6870e9c687a4e6750d747c194bd59e6cbb63930b3845e7f63a6ebd512972. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBLFP2556456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe09041969c4bcf2a9fe6595c8c105cd4da92ebfbb70da6fc67f3a58a8c4d0dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLFP2556457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24238210f402cfef4d76593751a8b142d547130469d08218be2112d498641211. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBLFP2556458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af5560aab759c2060c62e47886b63ed3937843aa8031bf17270f34017c969f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2556459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55fc2edd75dac778f57a1bd3644051028464f7d0acc9ecc79e985f12fc3e1d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBLFP2556460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514ea8ddadac35bcacbd59e763b755667304a5a411e998f9f312a87235db83b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLFP2556461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dcf0ce902947b64d47cc8ca6758e398795e8894c044659f485281cc2d9c30c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP2556462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4ecb1ad49fe9f5ddd8d41b086e00c9cce52296609d7a9d95164bc2f56a80a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2556463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e60e4cde5b68bcc872b618cd519346a2b48ef742ef3be9c49dd38f639f624. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBLFP2556464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4c3250a9dd614e9617b37a3961fce4d52c3ffec6e9b38d368b585ac86ecb6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBLFP2556465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9154bc4bd9d5fd405d4068122e2ef2ff22a87f5b6fa28f3044057fe724ca28c6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBMA22570133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93222595c07cd6c02ee54de98a6005ee6dc6e395e0b14ddd0c5f27c58345f43. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBMA22570136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b66047ac07203dd5f2b28738d536ee49e9b704f98d63a5409ce74e49b261e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22570137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e0be085988eea1defee71fb30b0fbce9bd14fdcb1ea9b5097a08855209487. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22570138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27c84915ccae4e4d76b98649e590792bd54e28afcc040fed01be950b291d80. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22574675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76184ee8bd7922b7da8014aa03ae6458d1e2c9615c69eaa4b26dfdaa4b93b94d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBMA22576162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c063b6d56496ca0137efbc328fa042ef16d01fecb7522f798aa53f500581121. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22576161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfa5b6ecce04992347a1cbe30b5ccf0baa0838f038fd33175cbcfc44f8cb349. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBMA22590094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f15cc995c89885a376877cdbc13031100b18b0657640a58ac61785d193208c. 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/GBMA22590095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78766e9f26c593c409951efebfd69ac0bbf80d3d991d199653260d9682327b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBMA22590096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4352a30d8a863e62a5a49be8f7309e3dbeb67f79b1353b18cdbf7b6264395d2a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBMA22590098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42afb192ecadfa0b5b9f32c25319828a0f156eb67d5a75eb2ee1aee3f81e328. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBMA22590121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8e5f297ad7748e92612adba9f385175337d0deb1286a14ea91f0745c328f50. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22590122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234d5d7d6742a7683379ebe02a5a66ee1828db3d0db7c9a1158e991e76730ad. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22590123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0382f6058406e04b31d041bff7bb4cb9386d198dd18f6d4a112bd6ac0a06811. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22590124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35f4ac53dc29d54621cd99d846d5c12203651b98c1199516f35cc657869f12. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GXHAF2566242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69682521d90db36e2b9a0b0e95c910fc4abd418a87238a1ac4352921b7ee57cf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GXHND2567024.