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 0xc8890d72f066ca983b6d3d5a46a24cfab49c206016add9f8698ef94b5f95e423. 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/42560c2a-3e2e-422b-a5e3-9f38dd2f5107.json and https://artists.proofprofile.net/proofs/artist/42560c2a-3e2e-422b-a5e3-9f38dd2f5107.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 0x56021096875075d77613db788038a1c5cd6d6c2d10854d2f686909fe2acc312a. 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/QZWDD2485003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1100a80557d38f0a3baa4797a018e85fc11a5ac41679403a3f3aa1ec7af033e3. 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/QZQAY2452268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75d0ad38279b818d728e64ab3ae2f9d7ec574762e6cc7ab8e6909382a2b83f. 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/QZ5FN2334392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1156f5ffa14bd4de006b3616c048817372a46e38647df8b7f1a588cf634ca030. 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/QZQAY2408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284b145d43937caabab1d5e0ac55251f7deee379bf2bf38eba1e9bb974bb90a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZSYP2435608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd471fbb8fd8737cc0e6c9b34c4ddcd8240d08824375e4314d941c2b5222d0. 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/QZQAY2454772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bc75e22e38b97631211809264063fe92f5dac6e0cd6964fd8cd20b87a92cde. 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/QZQAY2467064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3978f0d97184823444d8b1a9bdf3290b7e55c1ab8ccd6b0d96239604b2c71ce. 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/QZQAY2478497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388eefd1699a995115ce21f9479146000712821ccea36e2a67f7241112caf60. 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/QZQAY2455768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54faae7e1ac45e4d23cfa5b3773caf794c4e56e485d728d6c6e17481bf12ee0. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZQAY2466128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21d8c9eea690213fc63f2928b750aee63ab5338ce938bf1fbe646741218234. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZQAY2438699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd35524b579458fd915c791b5966e4b62024affb524f0f12acd1835cff22e1b. 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/QZQAY2499332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1100a80557d38f0a3baa4797a018e85fc11a5ac41679403a3f3aa1ec7af033e3. 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/QZQAY2452268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c8e3aff57e408ac35a4f08b9bd20abb1f0fe212afc5fffb6b0ba69f9be982. 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/QZMZ92359305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d35de7cbd9a2dd72dc1caf332a1aa69e3ce10c777154957495c19c7aaebbdf. 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/QZMZ92359306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d183d5f3ac82b29b5ac516e9ba59bfe5de8d0bfa19f134d7e620ba6dea8aa5. 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/QZMZ92359307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756c891e3569da006b7acad9d987d44398be6c894d31e17df9fd12df417c30be. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZMZ92359308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371feb317b5d8051a4848c3b7514ba28f703a299d23b9f851139c910c30c8b2d. 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/QZMZ92359309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8846ba8030b9c0c68ef1ce327e314b92cb341126906b4a8a42e274b507aa63. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMZ92359310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7729c7dec8b34f22848757a1e2a53f408c380a4ad9d87b4ba4e362805bab62a. 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/QZMZ92359311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165211b75dec72d910a5ae08696e52f9afa8b85850d29f67e765f849071f74cf. 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/QZMZ92359312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35c30c565a3cb734a23b54ceccb830f654d32223c11cb084f51c7a025b4db94. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZMZ92359313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a14f44cf3ee7996481f5fee4cff9179f5ba6eba72031df00d2ee39418bb1c0. 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/QZMZ92359314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9ca40b954a852ce8b10367f0d987b89aa7ba5437d117463bee6030d4e1a6f9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMZ92359315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a18ff123ea6c196ec0ccefe16076f2023753b6f56de73fa2d68b461ec60549. 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/QZMZ92359316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef5378e9f0c36d31ae6029042f14b597abf98315a900d73de348a207590b6fa. 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/SE6XX2357717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba28c968af2c0541e28d49c8b8924e91ac388ff2cd7c8f1e566c2a1d3c7409b8. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZTV32449857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee2defee84b670e4cd0f25336d443c941f2b45b494b6761c13ca4a93034cd82. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ5FN2334400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ea9c56001c8d2fb257e08340f4af11f3b2d91b43d84262cbfdf803395d1acd. 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/QZWDD2504346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233fcadf9d71e48e9c2254e0d6d04c562becd4bfe8389c76180bf03bbfa7cf69. 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/QZZ8A2418965.