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 0x71995e45605fa9106ac81c032459f0119776fff3d4208d2d549d2ab6a6492b18. 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/917af23e-c312-4961-8771-f9bb28986057.json and https://artists.proofprofile.net/proofs/artist/917af23e-c312-4961-8771-f9bb28986057.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 0xc0c7d5136479ab834a1e4248ec67e739889204738db69e22e10a4d719a16f065. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USHM21692782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b120eaf9372da61d5e3c36dcc0787a94df898b6731f3b5f27d83f2866cbe50. 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/USHM21692783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e83f5ed8cdf14d97a322e45762bc63e56b975352dcc1ceaa6a3e3d27268812. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USHM21692784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4db8469949ebff2652a2fd9c79cd7feca8af82296565e155ae72f6054b80c53. 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/USHM21692785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02a0fd3fa50b4c1eaaa215b3eb69b965f0d92db75529c2b01a2afaad057a13a. 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/USHM21692786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e989782438af5a222133510bc7f8a4637559d809a7ac9ddaae7d0ddfe9455d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USHM21692787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6452ee4fa46cbbce5667ae50b70c4e2dd590df6fb0606993d2a98b6677c922a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/USHM21692788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d213680bc163a643e99baa261ae47bb32b1c11f7c7cc53677451abf48c44df8. 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/USHM21692789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5377108a11e203ff38ce3de0c1a140ea1bb88094a5c551807a15686d9898425b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM21692790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853c7c611ad914e559cfa537a4f85fc4381b93aae9afec95d26063db7620932. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM21692791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc436e9b7704c31761104d7266600331c627e2aa1a3023a5e47f9929056823161. 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/USHM21692792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac5d94f13004ac322e0525386748a3f5902f5a6e07ba707e61c945d79f509f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:07Z), 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/USHM21692793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b562d7899f663897ae8f4091d7f941a65bc7498c513f1f3bcd2084b739af2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21692794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf3e2c219a0e9899bb06cc5a1fb366783bce8e48ff7bdf04e7d594b02f5725. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM21692795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc35be24952653755aa4ffe58284a18bf02df2f4bb0b9f6c7d7cedf1993b13. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM21692797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490e819d91758472ee2a2f2ed0f83fb716d51e79626d9f0dabfd29bcbb7780a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USHM21692798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f75e75def21572a2efa775f3dae9f34e3d6684f7188506b2d7dd38834f489. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM21692799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ae4f49e72be28d0a948aa1330c1b5416da12066ffe6348951a1e060e05532e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USDY42010923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1d3e2045c0c9c965978762c220f24359344f9b61248c832873319e13c2afb0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY42010927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa443b81ba66b3d63daa2600bc2341abe9674f840be4150670c12fcf95992c3ec. 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/USDY42010929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5faf6488f15bec2312da08ca2885c51f7b7358998d4f141c1acc96c7ecb595. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY42010930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d6137e11a33874d589ee11e4424678cfc9dd1bab170471bf71d8bc31a16ea6. 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/USDY42010931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a77bfcd5e9d124aae8d3faf92141b84439876155c872a7b30ea8e8f7928f310. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USDY42010932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d7a0ec1407d2c2043484c7484054ee644bc1cbe3a99c5029a8ec2714a460d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USDY42010933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ebdcd4eeae55cd5dfe2a7f3e570e21fc47414739e5a8b0a4c741297a4e26a7. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USDY42010934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4653bffec7f99b1d0d5af92962b26fcc739bd442a2d63d76183a7126938103. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:12Z), 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/USDY42010935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d7446f15ebc3c1d06def3beea4093bc208e99b1b7d6aee11f936e5da921793. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY42010936.