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 0xbdc7496d37b371cf2f030ee7d54a74f2d3850a2e01c1fffcd53ca9a9908c1b0d. 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/48491407-fe07-43eb-b0a9-b39cd1ce5541.json and https://artists.proofprofile.net/proofs/artist/48491407-fe07-43eb-b0a9-b39cd1ce5541.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 0xb7379a2744dc4f1c4a93d70673af2e81435ad2a3d9542fa1a344f6cbb9be92ff. 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/QMDA72203542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad719917a459e0411255a839c00707127925ae90ebdf6feca404b15dda5d5400. 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/QMDA72203572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9bb88d4ae4a7462f2ca235c4080b7b5bc8e0a270f103bdd743ebae9af3a9da. 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/QZMHN2234309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf31f5ee12eac9ead1afda37b7434e2cf77b97c07d5cd45329e8838965eb3727. 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/QZS652279150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c8562d779dbe6a585ef83c3711732888fce24c42543a68c7633f86f47cb2b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:35:56Z), 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/QZS652220736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa2a237c23be57d5ca8c328dce9498f91e79176b5dd2a6b2ab9738548a4c0ea. 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/QZS662277592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b31f5359558fef642b2adf004e102a7bfe41a6a0ecaef7e018dba1871a8a6f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMHP2310235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd5505ef36b50a94b7e8d08b1c4fbc2f1fdc1438c36bf09e339b97bf0d27831. 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/QZS632308312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b766c51e8e8663ac78fe778af253d30e8f850ac633239080c24b064a3c2a856. 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/QZS632375935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f10f2e8867b0261ab1822cc994e05baccf41064b016aec6babb22650acef68. 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/QM42K2346492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d86c1ee1ad1ad9ab91649cf12033ed94fe42e67036fc87e68f498b2f928c8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:34Z), 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/QM3DF2205312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcf01f6cca6be11d7c12ec89fb08fc3868d6f509a965a4ed526e3349edbc9a3. 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/QM3DF2205311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f064a2da4db948b9d2999b7a9e3c97e27728a45bd61af8dedee039eb21bbdb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM3DF2205323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af5c23112b077bf21ee0e42563ac658f4708a446b90996a27538aadd5431c02. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM3DF2205327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15675b2bf1ddec8e35ffefcfe533ac5f4f1d7c4ff7d5ce4b217dd9b3549b0c5. 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/QM3DF2205328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83595b81038eca3f44b41a579fa23809b80201df51f324c1991eab99ecb6d35. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM7282378713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a4219136dc6e88bc89e4894b69f998ecd2d84b18ea4950c7981bfd032fd5b. 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/QMDA62398462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9d11aed487d450aa6ba3ee65e623a6a088cc2176120ac925fe0b49cf1fa911. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM3DF2289730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52037f147f0be74d356cc08c99ad19c09341f959daaadb136ef58ee7f371efa7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMANG2219870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae4e8025afc1caeeb738ea34702d477280c6bd994143cf5561408455f89825. 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/QMANG2221410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fb80b0ad41c1a76c77b3782bbda27ad91ca351b123c6b75ca8b9293feea2e1. 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/SGW502285082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9823de1df8fa44e1075bbaa2d6b442c9a3bd01a9cece8474cd20317f82c9c93. 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/SGW502220086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf431a1749b559ae003dac422a871351c345b3b48c8d653bd89581685798df5. 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/QT5M22568716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa411866417a8d54230d600d456ed589f25f58717265271d4ee9206025f45f67. 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/QT5M42544304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c323851d4dab6ee86d3ba1497777fe49d7dfeb4cb1257111a815e76a1ece3e. 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/QT5M42553897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114e84414dd3a6d7202db576350912109b363f375d08366d53429e89cad3092b. 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/QT5M42555109.