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 0xc3e018ac71c866699ef836d7cd26b13057bdb1ddb24bedcdea54a781b253dbec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d97249a9-6f22-46f6-906a-a42c51e5e43f.json and https://artists.proofprofile.net/proofs/artist/d97249a9-6f22-46f6-906a-a42c51e5e43f.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 0xaa27449c7b9289bf57dea6493e88badf897323b2294745ce529df5ac605a3959. 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/QZKDK2036466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c3a1a5f29ffd371fbc456c7023d86ec060af5e1e97b874381b873667e77e8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZKDK2082791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe79d694f5c62ea2db4eaa987d171b7ef34173d765e371476aba45f2ab74fcbd. 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/QZKDK2039013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25de60a127ae71ee7f72ed554524c2de5e9f33d2ce34d6eb9a2130c4c8e1a6f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZKDK2032063.
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 0x0973d47d0ab80100677640e97e845a7d675a3737375421e1f33a8985288baa23. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZKDK2019738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4355a83b2ac0c22177ff14d5113cb487f95fa2e2ac38e3460ebeb48771c468. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZKDK2070620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1992a5ac1f9088d2a5c15d9f5d3de3a7a9406b988e2b03121ef956cee71cf23d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZKDK2097147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665825c9574635899c0fba591ed08a598855c1941c19cf246e35ccb38c1bb5af. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZKDK2017176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf4f88cfc86d93cce25dcfd4681de07dbcad2ca2cbac69b33ea370d58199be. 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/QZKDK2056179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab18ef5272e0c5f18fec26e5caf5e7141632de20834ace3485bd6dc891ce68e1. 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/QZKDK2054159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244bf2dfd649538f7799dabacc59532f2d54af1a033c3f955a82ec41e041c21. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES62493395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1b7ea5597b989f4937d6e62c97efacb688fb9ac751c9edd9c1e600ed83fe2d. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZES62493396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73484c045be264bf0a913a46b49178f73d5ff150b294b76f35afbb6a848a377e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:18:00Z), 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/QZK6H2462610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50462874f7e8c027771a6aac5557bd263d305bec91ff718a6b6997dc35bf192a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:38:35Z), 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/QZNWQ2447352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8091638ab70d62a347f4292c6897056d5279665462e3167b340155356fcf0c5a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZRP52494239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9491e1299d5dfb66211204f97d8b1354c98fd7f3060769c1316689dfaa0e2. 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/QT6EB2511359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d672f54bbb956027df3066020e81d5314dbbe85b00c676ded543306b35571. 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/ES71G2302921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d98c7ef7cfaf4089ad899a143cf8778790246b6714d73a0e88e19680cca0b5. 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/QMFMF2011639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8875b0f5781a463e80406bb3de50966c8da2ce1c10fba4ce6ae0ee462cc1076b. 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/QM6P42075165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb9b1752f21c0ec9fc5f13ccdb9333016a266f7cb90c32b0b28c0135588737c. 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/TCAHS2353379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5feabe4f467747384ff1558d51331886c6e0d0bfdce5cc37a064e70cf38139d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2318500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe236c44899cf64b0fbcc75fedbe19b6e0b416f16babc3a95527bf411f09fd635. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2318508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736a01718201dab8bf3542ca72eef5d25141043b3aa88b67ebe1c2316556045a. 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/ES71G2318510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a80ae87524305baaed7c8a4b63290f4ab1a73004788909825cc99ae42183741. 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/ES71G2127282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a4f8af69f942a09ca3182607293a24bbc30ac72aadb082a5ebfd4b0892b428. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZK6F2208910.