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 0x9e24770d04cfae2b210b2aa30f77eaabf2d727d2a6516833578f5d6e5317374c. 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/bbdaa8a6-5509-4803-a6c6-a4ebbb404205.json and https://artists.proofprofile.net/proofs/artist/bbdaa8a6-5509-4803-a6c6-a4ebbb404205.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 0x8b48db38b78012d62169588ca61bcb5908febe03f7866b6af213bebf43689d62. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWT2182023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f25c041c997ad7b860bd2ebda362de01863d3416159d1783069f0b84f236439. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWZ2147141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434b2caabd95ca6b67876884c5dbb0ae3859ec71dd1b8d1be491646efd1a800e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWZ2147142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5040241a335aafbe4a5f55beca76e5e3cc645f87987a1ddb896b42a20a2a49e1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWZ2147143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690f5ea4b620ee8819ad06a466fc18fcf1d8b4117a5379a801c6adadc7e9db0. 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/QZPLR2159626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a2db3910df4db9ca16971059343e11eff434a440ad61359c8070a687d8fefb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2159627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52607fb060104da4b92dc58c60f37085c74ec003ff7b8456895d74556545f5f9. 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/QZPLR2159628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93aae4d1ab22e0a028b32f202fd6e9a3b05d8f03eaa0dd92d31823c38bb969. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2159629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f413513dfb88db6fd65fcbfee45a30fbb87e29a13ef0a7e692924ffcf1e77f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLR2159631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff223d542d2ee7f5e79f4ef7c5041793b3cba3c46c2ddd13106b86edad4d4eb1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZPLR2159632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556fece137d5a1ec7b435d575276745b62212ed6b0a839f64ec32e8d30164c73. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZPLR2159634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c38ae688f0940f65baf80f2db56c7530b60d97f35fe5686c8eff99b4d02faa7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZPLR2159635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b396b83669a3c7c8cc6246bdc8ea98daaa6ef7173168d22c71ef7e8ab884a8f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYX2282349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64c87c1aabd9877c935b2f86b4748da32235772145b34263b11a9a89f25787a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFZ32288294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044278b1e136bd2837d2c34ea28418095883c373fe4bac043d279b7d34583177. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDA42317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56536185ea86594f865137b39bd1167098fdc2850fb9ae309685eb327966d8db. 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/QT3EZ2469075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c362097ebd4432374d7e6945e4624047a337fa557ab9e402bcb9a537b295d. 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/QT3EZ2469076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d7f67c5453b74cd372562153ebe465974aead6b2709cc8540b6e5ce2f05320. 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/QT3EZ2469077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1253b1510b1550ea324721854a14e115a87f40ad56223d65893cde709415eac5. 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/QT3EZ2469078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eff663821d6577ebe0b175fa19b67b2fdb0086fb6a5349a721ff53ae8e3167. 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/QT3EZ2469079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab36c8d391cfcbe3c36b9593bd54a1f6e62491574d76568950d44211e484712d. 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/QT3EZ2469080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ba966d6fd68fbc631b25eed26c7b938c0813a07b9e40675de798209abadcb. 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/QT3EZ2469081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4543e284f95d0b346923ebb1f778b04578c4476d57a014fd7c7e832a39faa028. 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/QT3EZ2469082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67941d1491269971786e053054159069d97e9547f1f56753a6e1331f0afdc31. 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/QZPLS2472497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1787e2980837d573fa0d9bd457d6b9a319bec0404043df620f0ae3fb589112a. 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/QT3EZ2469083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbc9734c3f721ce7db9a5461e34069676c31c5dcaea1f7e7f8e939fdbcc3f2. 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/QZNWU2442044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbc9734c3f721ce7db9a5461e34069676c31c5dcaea1f7e7f8e939fdbcc3f2. 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/QZNWU2442044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb239ddc3565d4bd191732bceedb81a6190bb035f92f645350d3f282dc40ea3d9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6G2415025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3f1cfc726d6ee33b77a997f81844033b2f7eacec87fd9373271b3b1697e2f5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWFF2329133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e6d68b6a49d34f31f2ddefd1ddd502d7d4389184de6ec0da69fdf08ff1c2f8. 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/QZWFF2329135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382bf93c3519bdedcc5e3a52548f3f7e5ed802fa5e7f9c4204164d6b6399d9a. 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/FRR642401439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50db2e301a8c410dceba9c704fabef1ccb96d0fab78149d274eb9eb05c95c9c. 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/QT3EX2464776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2602184544b63e3e729fd23926820a34cbb13d483e9a246776387db5e091ba. 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/QZZ7P2458399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2602184544b63e3e729fd23926820a34cbb13d483e9a246776387db5e091ba. 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/QZZ7P2458399.