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 0xeed6a528ecf77d4ce2d32b0cc88977d49a722f96c2df2b75232ebbe7b2a9d37f. 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/8c3ba33f-cf0d-47f1-be63-a54dffcbc3d5.json and https://artists.proofprofile.net/proofs/artist/8c3ba33f-cf0d-47f1-be63-a54dffcbc3d5.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 0xd0b1b58ada4dcd4cac0ffa0a7edcca3794ea6ba9de5d2a5c14e26f5e7e64f82b. 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/QZRP52362733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d46785ff0efc2976df111f5a760a41a84dcdb9dacccd557a4f704e095df5c. 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/QZRP52362734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7386de1fbf15618238393d39b10456888ef59c288f083d2c981ca94fffe50915. 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/QZK6F2371453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19380bb87b7a40dff528cd312de2e3709574d52a0aaf9459fe46f365f2035968. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6H2355908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382f15768ba45df92206047c0408616d32601cb4714d1d9de94bc20e21d96fe0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2320344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77489353bf2022f04855fec4267d77ebfd7036cf5835b3b1600a038a200fe218. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP52362735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5fc674488199cf9f49a77ec028eb5ff000f5dfcc94092fb44fda82cfd5bac9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP52362736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81bb038da4c6f756bacbc3385fea8a997c57c5b25ac17ad6e73ad26b6fc5fb5. 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/QZMEN2348323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f4a730e9d007a06278e818c3e6ff2ec27d8563e0066107f8c3cebce21139c. 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/QZRP52362738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ab20236c45e289075daae7884de960f03a51c4ef08ebd453b2386d4f66d02f. 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/QZRP52362739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984c0e7fc72680a9c1bc639d1e6ee09c0d19910d789bb4f5296824f363bdd42. 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/QZRP52362741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138a7d69fb43fdcc8526ed41a44f3ba25f7815c2a41c43ade7d6c279b3e65e8. 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/QZMEN2347394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ceac64ea4d05eed8feed1ebe481e8b93d0dac6ff2a0a9c5418c55a3dabc77. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:41Z), 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/QZRP52362740.
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 0x58dbad98a91d40f6257ff5b2556b545f0e246b5a4aaa7143ca4cdaa6542cd664. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP52362737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c4c3b35ec5a3e7d6a5f1b4d23c18d30798b3699492f6940875383a7a3d56e. 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/QZDA42209318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ed12dad32a8748b874cba78f4365e44bd969efb134604fa8079b65e3ad030b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFZ72202807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae624a0f484efded163b6e502490625db080b30c8d2a85dd6767491e1e277edf. 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/QZTAS2182249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc72da2760c0b6387c8e02b955fa2f1e6bd0b73b966c86e9f0037c469c2c67. 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/QZTAS2182252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c79039ec0613fe635cd38958a35901e67d20097e3f14f758fbf47658896fc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTAS2182248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b2abda39691c0132e72e6954b376804b7437d38210d8d77f342840f6ad975. 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/QZNWR2085153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3754d3c3b3914a7ca94cfc922cc5cc5b62d2e105a33333a61975a2fc68e2933a. 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/QZNWR2085154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1d1e27bac1df059f27dfa1df7063371a9a8424d32c27f14b85fbd599c2c5d4. 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/QZNWR2085156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a360673bc6168050be71454ba33154aa083ca9217f605c4b95b2df86a2a4f9a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWR2085148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdf9778211d90010030452bc438bbde943a1e22baf4badf665b53b865dd6187. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNWR2085163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58339ccd7fc4061f81b3f69601d84f03ecde84cfecbf77d14d2390dd4937bbb. 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/QZTAW2405732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43ee1ec00d2cb02de50f8f3c1b0b304d7374ca6d16698e840166fb86f72aff. 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/QZRP42439460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a986820521f2edc42dc555a0fb79c3985458f4ed7dd66a9440b9827b3c217. 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/QZHNB2464404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a3877d35ba9fcdecfa6916c2b88ec72381b07bbc05ec03f01b99c75b4786c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES62482363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4239cee3f279cad3c9d3a15993ec2af3886d47748609ab5ab0ef3d851236c6. 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/QZTBE2351285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b3e9322cbfcdea24ed650d93e481e83963b0a10fb1770c51bb310e006c734e. 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/QZTB72367959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d86e3550843ed4c01c834b92f03cba975fbe0af489f5eb316c84eed3d2c9aac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2366648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e8b0413bd58a47df6192b5985226cd1b72f36398f80bb6fa4c8235ea13e713. 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/QZRP52364840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26480a00fb3ed2f2becb843c1b6009b857448b5292cac0825519daf4a3fca199. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX3HH2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83817035e9fe136c888cfdff4af0e57ccf30c5c9bbe848eb577b3f58d022445f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2398792.