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 0x254757c6c222e511967076c1d71fd0ef24be2dcb5adb4efc72e8d1339c772595. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/701b7291-fcf4-4ef2-9b37-a9865a16971e.json and https://artists.proofprofile.net/proofs/artist/701b7291-fcf4-4ef2-9b37-a9865a16971e.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 0x88b710f45fe00c698a0b1d697385f61d66a0662887e8c79a380ce6a33ea7d146. 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/GBXCJ1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9a608c15aef4976d6fd2605755a59e7c976609e55ed7c5b42e8871a2d9c007. 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/GBXCJ1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2bee6bac306eb6f7f2c6de10ad96533ed9b580d4c5fd484b52f6099160273d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBXCJ1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4dd8f20d92e454ea28039e33064a223f2c3ee36e60ee6181eff3c507e7db81. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:55:00Z), 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/FRPZ92346780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc88d06dbd6660f6aba4411bf62f2203d110030611ebb9c3fc1ddb9e5fb1026. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRPZ92346830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ed162b9e9fabeabedb1d07eae44423b28139dbe6bd2fe222308bd638befa30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRPZ92346840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef12eba68c5e7848b1e1bc072b5d215e1cc1cf17ed5445f90fd711c8c08d580. 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/FRPZ92346790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae01f2a83edd625369a76d860ac006075889b0352e76df89508bbbaa46c5cba4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRPZ92346850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55682f162a2469c57ca4cc6d3e966c38173a768cd8969d45c65b547e7cd87782. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRPZ92346810.
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 0xfb2da6d64db91e9fca1cf47bdb1b43f2caa55ade23ce2d0c61934a251b61e967. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRPZ92346800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4041b9fffdf4b69ca6aca911921381e4e32f1f663d13c5b8e9f2c929ca9f997. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRPZ92346820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b14ec035d28aac323ece476a718dfe7963edfca5d478736903c4ca79bc4f7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRPZ92346860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f775eb6943cf3ab9632e44c1139f040f9352fea0f1bf5ea2ad225d7440dddff. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRPZ92346870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4807a61ecfc316e46546189f235f627b0722b94bd23e84d4df4098b2bbbe8f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRPZ92346880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7b5241be75525cc0cfad793ec53dbc9dc58937eb04feb3edc539ebc6cdc07c. 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/GBXCJ1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a8cf6f8d201cd2de3fa454cc58ecdf888eca63266d3bf1016b4ff700ee08a. 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/GBXCJ1900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391436fedade544e3441d8363c5106c5d2422e639f1cce2d7e786fe29940972. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBXCJ1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e80e3b0e2e179964543b7927cefd932cc6f3b3fb41a0dc85f23188c5eade0fa. 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/GBXCJ1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3511948c38e1253f1b142fb82312daceb14394cdb580a3181e1dc9ba053d926. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:40Z), 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/GBXCJ1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9fdaccccf271abe3e187e49b610072684da282adc00bcd486c1ce782ea821. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBXCJ1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00e06a0aa59e2c0734466cfae9634d23083411726b7ebd14b93cb0dfef88fb8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBXCJ1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bef7816d62084562c7f43b92df009e6ce3d28d7005ff29845f9c9faceffc1bc. 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/GBXCJ1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673ff692f35940d9a9cf29e0eb4e1c47616125e53b48859989fb181c3874618. 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/FR9W11728280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344a699b1d160f7106573ca2976c0b37ab125ed5f64c3c1185d19255021c1eb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR9W11728284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565aa44a8ccd54fd631bf226791fd042c6bf208f3bb13fce3e35bb7c339f8ed6. 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/FR9W11920610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a54a480bee810321a898ad33e1b29e954e1af9cff8d669f05e8f75a4700af. 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/FR9W11920613.