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 0x81aed0677dfbd2e603c62d896657e2064931319276a4cb85fab03d5299e79f42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef712598-fb60-4b73-991e-ed629aaba50e.json and https://artists.proofprofile.net/proofs/artist/ef712598-fb60-4b73-991e-ed629aaba50e.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 0x3d1cb49ca6ec944c17703570463530339fa87016cb17261c28f582b2a1fc130c. 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/QZNWR2379686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1263249c838e798e0901eb429ef26a33befca9ab70baee47ba1551f27cebeb. 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/TCADS1883574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72926af1745ad680049e0975c838b45b571e763ec8f199777c23eb1a7ecef7ee. 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/TCACU1675354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475ffa93bb195bcca182aef09f2fcf8f2875e78cfe6dd0eec4b6f01f76b283f3. 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/TCACU1675368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc373b941683f4b5fa8250d977f6edf4b083fd04c91c1247fec7535e2bae17005. 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/TCACU1675372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9522b580e34f8202dafeccbe8937b3ae922cc5d52f8367e5bdcb878db7fb9. 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/TCACN1649769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1966f71bcfdb163cd1980eb964511777d1a2ed4350aef79585cf361a093922. 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/QZWDD2366283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6f319035fa27c475f1f7708f0e53278aeffc6d8c6052ef0b29178590f4fec. 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/QZWDD2427490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd46e2d1a17c04214badfe4249f6527cf9d6cd93c43e3c11a5d96f5d0219055. 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/QZWDE2494107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb50638dfdabe3bb428786b289e22358b081e2bf43581a8270a1be0fe1777019. 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/QZWDD2427505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0224473cbe7271c57d5fd32bcf22496a078882eab43bbae804bcc669130220a9. 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/GBWUL2138432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce985f79abfdd287b52a32f4ff644f845d26ce2f9a740f347cbe9e51509355a3. 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/QZWDE2494142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7a0da15768a0670fb1b10f2003dcb8a5e22c3ac2a2422855766916cb93b37a. 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/QZ5FN2120180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60419188fbbe6155fca1325c517479498b8ebebec4bf9416a6a2e0e169a76fb. 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/QZWDE2494214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d7fbc1a545317605f92438252b645c433e03045f4099346603c9e59c39da59. 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/QZ5FN2033371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94eb3e19ea29bb11646963b980e4065878518388b30e95ebf56babf0d6e8ce. 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/QZWDE2494281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe302c6f2afc78777bd756c933abaa7dfa59c12acb1f19a81432d7018faf6182b. 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/QZWDE2425057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1cff1eb03a61af891afc7f31998a799938f52f5122c76bd23d52ad2f2a5c2. 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/QZWDD2426911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc94edc97f5a57092aa951e7c0590b319c9d35557133e6a37ca6b18108c852b. 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/QZWDE2494326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8208dd5ab4e1fa5cbd3eaae9c510b47a471bc673c2b8adc7755635bb42554. 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/TCAEW2046644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781ac788a0473de6b9803781bbf9580c00450e044c7cfcc9d27211e4de43a140. 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/TCAEW2046755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ed974746b7e1cbc5450cb45e91602c767f8d8380b13632819967fb63555b2. 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/USHM91819324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95a5b8b8994ddf50cc845116af712937f383104b61ff858c8651378848196b. 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/USJZJ1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8618d8f2919bf0afadd5a4f33b05c1d19d05e8026180705f0a0ea85ac63b9884. 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/USCGJ1897616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c23d1a5569bf7bcb8b54c864c2045048bb8e2a885dede4842212a78011e0e4. 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/TCADY1897813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38693da843e621abad7368349f58ba320656392dfbd7202ac0a85490747e8eb. 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/TCADY1897502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955071bfc4e70e9c74da092702df51282de24bfeb1f3f5fc0c0c5b41245d135d. 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/TCADY1897511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5400dca9d42c7f5c15c062732fb8aa9a3c441e1491044937eba607de8ed86. 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/uscgh2215730.