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 0x0a3b4bd63801dc5faa40625c7ca6d185405dd98cac60aa943f7d2545f89c8cdb. 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/7f1b4392-c261-4ee1-94d3-460556982962.json and https://artists.proofprofile.net/proofs/artist/7f1b4392-c261-4ee1-94d3-460556982962.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 0x038bb4d53d279eb58fb50d59f64ec738e08b29df65419e122cb8c5349bcafe00. 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/GB8KE2324550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1e7a180d136767ff1fdf5b0decf0cde406a1774c80dafc8e5cd38fed5c03b8. 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/GB8KE2324551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b53dce13c996a106bc235b2724ad80797f44f95b4c149407011806185f15462. 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/GB8KE2314206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685684479cb52672cbb6cee3d009d6971757a6a31ee2f7cc63ec6932bfbf8690. 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/GB8KE2314207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2545ee64f5df5f7d2d082dccf63d47732a28191f3dd7f3ed54c35ae2d5f93cf0. 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/GBKQU2337330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b6e6c2be434aea3a1d144495b340a3c3d772bc61c923b2ff8a4f17769a24e3. 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/GBKQU2337331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4616917aeb072b42e648c8af8f7c498c9434942d73a029d0bc70214d385bc718. 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/GBKQU2337332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d5b2f210a64dd470158b7929d3a8977e3cd09045d219d042377c151b755d7. 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/GBLV62102366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b677f0800c93a8f636d37fef782970e32286c803b2c5ca389297384f51aecb. 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/GBLV62102367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cbe285915469682d310ccb57c009dda9ae273dd3ad4f9cb867df893505c4f5. 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/GBMA22158736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b77454db0dea4da920e339527562a80cc2372d881311dcee887d4180f6d061. 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/GBMA22158747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b55876f71eb3a2b2a905884ddafeff809440439dc93e6a3ad1dfe19aac18e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBMA22158748.
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 0x1728cc9cbde9ea6b63db4d57ac065ac681e67a8dfe77480b33bb4dc835088d65. 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/GBMA22158751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fff7bfc92e5d05bb01af1ae7930242351b2bd03c6748d63bf7cd0c7c5f8fb. 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/GBKQU2070042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b311ebd843697d1653b1ac2ae53698fb755d85cbcce5e042824dea724b169. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2070043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615d8af09e6f2b5b2ed6d34572f9bc1cc9b37bb9d66ee6554e864c7f7a36a94. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBKQU2070044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb58555c2cc74b44112ab764ec9b98227fc0fe80b9e3d4d0b24852bcf6592eb. 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/GBKQU2017144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93950237981e5a6f9a03ec752f459fad00e00cf6d75338158fdb0a6b4f5465fa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2017145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77292ed36fd6dfddf54075e7d417190bbae9b31140878a84c2cd2e3e951415. 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/GBKQU2017146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb47544c54ecd24dd39ae1e2b34c06f5d5b8b0f78bac57ebf34fa0535454a81. 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/GBLFP1886909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c48cbb0069046aa27b3195537328ef143139627d3a6ed27d563a1bed4d41c1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:48Z), 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/GBLFP1886911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e76eb31fff3086c4e0b2eec1e01ef54adcbc81f76dc8f78d19f6b2f09b610. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:39Z), 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/GBLFP1886922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255212ce96c4625f271016ee24de327bbcfe2451e6a1cf6a740448a625204734. 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/GBLV62021808.