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 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 0xf98b150ff131eb1892c9974bcb5f64604168300d84b64d0bae6d924a6b785832. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80a10b90-0182-4dc1-9204-e582999f8b5c.json and https://artists.proofprofile.net/proofs/artist/80a10b90-0182-4dc1-9204-e582999f8b5c.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 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 0xdb23c2158c39c3df8d582dafd8e4d6737d8fb37e7a0735dfeed62c3ca8d2738c. 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/QZ22B2047894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14cc3a28c4ecc877870942f55a7b516cc6240245ed8c990ed5a3688cf536201. 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/QZ22B2041738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d49d570c1bd3a53bed16ecbbe94eac346a4f7ccfddd2006a3ca4fdbdc712fc5. 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/QZ22B2041741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb7550d999c2534a52508fc2f277f08706b056e1eea8e9976d4f8fc0e36adb7. 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/QZ22B2041747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0072c75d8db2b6201de09b393a77441162a9ba05a36393ac8d36b0ffb115f11b. 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/QZ22B2041748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a71b0ce0581f5ad7028ffde49606a166033ea18abb50b79ec3f316f80bfbe. 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/QZ22B2041749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749fbe0b67b5a2b0cb293322160e6e6bf581b246100c1b044dc3a5ae5bd0738b. 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/QZ22B2041752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5677c9aceda682b476c85a06846797c2e10c86497d2a71c9aa8bead28a58201. 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/QZ22B2041754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cd4ba89f2adc3a77f79760c96a612bea82d0690fb91865c139c4e758416fda. 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/QZ22B2041760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7e8e08305cdc90353988ebbb571ccd4990ef739cd7aea92eaac6207104e671. 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/USHM91899196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf327f359de41c4d6575d52171bd88e443946b9708b5fe490e7205d7031e44bf. 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/USHM21967905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87302b169d828c591fb3efbbdf2ceaba4b5160b821e7ab2fc1b0a5e12fa904c8. 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/USHM21967906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba42d6dd487ad5536089f6bdcbc97b68acf563736382bced5c630bbc29e75db7. 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/USHM21967907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c168e7d921c0206081c3b2f6c20e62a2ee020d328c6fd3307f713a512e7870. 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/USHM21967908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d643f285aa2fd568be4691e79242f397a7e6753e026e2b196789207e1b97931. 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/USHM21967910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b99ddbba64c91f439ae1e6292c262251b9336e77f652a694dd1dd39beac561. 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/USHM21967913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a319c6c8b6896eb2af11365255fb65ab2efaa372cf3ac7f918a13cef763902. 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/USHM21967915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b9a227da1c61cf134474be1461e7cadfe99762cac4d0e25bfdcc77ed1ab99a. 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/USDY42066001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f87c8754de5f32e83c4468db25339ed359e08440761147a172af462d573c2c. 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/USDY42066002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73a1e07442807f0013adf40973679c793c558646e8764d9264e1c85d26c16d6. 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/USDY42066005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dc64431aae5c0dec7f579afe645fd75d793aa5a9e1dab8e5f0328897f03915. 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/USDY42066006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90b5c4de5f0dc5cdebe876b08c2082571616cc31bed8f881222f2f56e98237. 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/USDY42066008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11b5098941837d0b2a5d383126aaa33229a1196ac13c2013d0b32d0addb6519. 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/USDY42066009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e7662497ecb19f5b934a02ad3e980adb36a33eadee104b5c3afa087dd7ec2. 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/USDY42066010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbb432d95460f0d56d69a547b9944e872c73b91889fc2a6bf54d5b72dc98b7f. 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/USDY42066011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773c8b4b03ec184fff6840a83dc0841cceff0cc5903ff15a2cccacaa5228388. 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/USCGJ2123414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd1f2f2348a0486841299a6751868a0e5b396018758cd2f640ca77938955aa5. 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/USCGJ2120433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2c3a7101cc9c3e20210815322129b09d0f4952ba342aa85afb0c207105f628. 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/USCGJ2120435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94be663b77a062b8f9666ecbcc656af3e56b24ea960b4bd48d610d77fe63f7. 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/USCGJ2120445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb1d77c784e9edd31dfc6582a207cdc0a6806bfd620587e794290f49ba4e7d8. 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/USCGJ2120447.