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 0x25887498bf9e6e8b38262d3549f2abf8ad88f705ff05cec07681aa79b6394c4e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ba01d0-fca6-4d56-95d1-4793e2dce0d0.json and https://artists.proofprofile.net/proofs/artist/c5ba01d0-fca6-4d56-95d1-4793e2dce0d0.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 0xce8bbd046750d9e675970afa2d6685845bb83cb6c0335270d9f42ee30cfb9699. 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/TCAEA1833439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac57f8d10e2849500931a5db42c13c55e8bf679fadffc95240f6e08eff8696. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES61954234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053cf45bb6c1d7ca94e2a1b7cf61927be0a02cd0aeba95779c90d14684d34e7f. 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/QZES71919827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5af1d1191429f083e614381c4c185cef506bb5a39495cf2ac648ac4e634c9b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ21934411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8154b765a7820a915a3ceb8042aed89aef47cde0d16455cfbc5c78710fd9150. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN61991067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38cd7f4f733bac7fa9bf85340f2e790076ebbba6e6dfddd144e25ee9fbe7b7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ZZOPM2002202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38cd7f4f733bac7fa9bf85340f2e790076ebbba6e6dfddd144e25ee9fbe7b7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZZOPM2002202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d970b790c9bb5f109e60aca471f76669d9cd6980edf90de976e8211c838e61. 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/ZZOPM2003732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f05c6fc48d07bbef93ce9bb5437d73a56930db7110cde3b434018818950e0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:16Z), 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/QZTB92306484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6dbe6774e602cb97342699b792b31aed8870497672919bf55b863c9d3a6bd3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:01:03Z), 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/QZES82403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe514f7d3dc8ecf989bf612335cfc38e9b70813875bc672882abe6634b37967b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZZ7S2444576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa48c168bca7cf6f910678ef5bdd811e7f11ead65dad77974b910f23e4b18d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZZ7V2401025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47877ca332755872e09f77d2c96927ec5ef6eb71f15e9430294d48afdc511d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:24:17Z), 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/QZZ7V2459009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0cb7af91974a74c6865345bc95ffc07cdeb202a6309357bcbfe6917e58d57. 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/QT3F22447166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9caeea0e703031d19730c5d76a7232f4e7e9ad4392770ca1f38e64d371adad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42577120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cbc3ba46dbb4ba31a585ffe0cee8c9bc6bd6feecf1e88f55c23023cee0b982. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN92504469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f492a675df11fe172cbb03124bc916266cb8b1838a917e075084845d7b3a3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:33Z), 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/QZNWT2538425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d24ecb7cb2de120b773c7748537a040d386b1324a7e68fb1a19d978f4c1c9. 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/QM6N22574959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e75ba9d3e6fd62382d8e0571d77875a43948a3c05effb9725fc485f20d8a7. 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/QZNWX2567567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0a32bc8d1dc269c0652d5f1d1d1bdac7f05ddbb1aa1a5a27c3a28d936d29c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:33Z), 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/QZTAY2552107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2270a30a07a28d8fadff09a6cc0cea98f6a14248e9ff344878515725f3fa001. 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/QZTB32568021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a2302292b886aeaea0fcb2ef2ed875b84ed8b848a0d1793ca687e43bd2690d. 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/QZTBA2503828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb638442889a206d8915ab984d4d2f5199c1756e186fec7a91a96abf1bdd6c3. 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/USA2P2526887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f5b327a7179db7041fbd13a4b42f6cd790ab27e9946a56dbef14f0d24974ec. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:11Z), 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/QZWFG2547122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a0f36cd4bbec3246ace829800293a425c623ede4ac2304f6c5854def29bb5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFW2524885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b01ebecdc3e9a1c244fb28118a5ec546cb35c182dc83b65a65f6fd75ebbc4e. 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/QZZ7N2547313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e4b4ecf10b606db22cb2c0045529bbba358084e47f50b2c7b24c7d0bb2a2e9. 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/QZZ7X2534526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d466efb0ec4bbfc178491f15a0d3429c340ba9a3cf37bc98462c286b75771. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F22572500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55f807156184161193d03ddf065c454e3b3dc3ab77b5f5abe6d4559d43c1f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F62568693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54def6330c2273231d00e1157187013f58014fd3d138514fae8f568fde6ee8. 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/QT6E72589856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdfb281655c83583bb91bf3d66a4288b67ca1831d57293382ae91f2633e4fed. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT6EA2575683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9681e789b7f01203456492b42e35097074b96411bd906d49e5e65300c33ba0d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADN1866300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597540316c59c22e89ced05ec81254855a104e0d95b6596349a33bb2505688e2. 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/QZMHN2344542.
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