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 0xb2d2ca29aa79e67a29800da3d6afbceb0460b93e0a9334438607de8329381aad. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f999196-9fbd-48c2-b00f-4a143d3facf1.json and https://artists.proofprofile.net/proofs/artist/4f999196-9fbd-48c2-b00f-4a143d3facf1.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 0xb727ba8c92c81212004b4d197bd4fa877fa1f6c76c71ccd4a5a7057a68a6cfff. 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/QM6P42093976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ddc3f187bf7755c9ca8f37715e4e4bd1621380fd8ff1bb5d415332c3c69f36. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM6P42093977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8c964fbf0cc1e5e322ac387adb5772e352d62600e360821d79bbdedb1bb42. 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/QM6P42093978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef261376ffeca33aa378facbe942ec7445880c20d9ab60729157edc27ab1312. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6P42093979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde994dd77c6d7dd409e63fdf9f05ea021179db2ae2c8fe4c20ea0f4f3ea9e8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM6P42093981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd45af5d296be4d97dbc9ce7dbec687f9708c23848a5b81754a758520d10189. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6P42093982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b710bba732d00a240059d372e8836c00d6821bf520d5d403cc912bc75feffac. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QM6P42093985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b479bf11851091f594c741884a0e73974cddb84671b496a3e01cdeb87651a94. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6P42093986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b5cae0a7463d1cd7a55d44a396f53d98206816d5929be02c51d5401062a52. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6P42093988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1910594f824da89ff2a5e32e3241da6271d635b4d198527d4c57a7dbfc5d230. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QM6P42093990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d59fc092f544c830dd08960c075fbeef0971a211793d60ab95a7d583cdabf8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM6P42093991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a75ada83bb9db6b251a46c5241a1fd864e431720412e6185e14bea693638c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P42093993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6d030bc4d3f3bada4ae85294756492577dc46289e116246a9730c7442808b. 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/QM6P42093997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5d504b0ada6056d2353fab07eae28ee2b94476e3ccbb0ad87a25e4b6e33528. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TW2451824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a381203b4454a8f6dcaa6cad7ba6c983e19cb1782d61cc2819cf64bb2ffc422. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM4TW2451825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa40be1ae0bc8ad2551076334a3837259d3c135bc70ae65d0ab7dee23db4e093. 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/QM4TW2451826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad656f30b4b18fe559d8bd4fa5c061070f6df4e1dbc36957c91cf66b9d84c9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW2451827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3215e9404329e25be7cee08079247b16bf9adba244127274cff1817caeee4b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW2451828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d789d18a7f5eb57747fbaa08595aab4162eea73b62afa8e172aed8f1daa8792. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM4TW2451829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407bae3fd694fc3d2eb5604262160f841054364c5f6ce92ae9cb3153103d63b8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2451830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3881b6c141ebfe9acffa7a0ad409d8078b6ab9d616794bc65af3126305271487. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QM4TW2451831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5740c9eefd634733f96f1f6a0f2ecd00a0adcffa7518efc6be6615f01f99def4. 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/QM4TW2451833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d9e14f13e5385a00ac1b4018dc4d75b0655d2f4f4fb3ac6e881296ee6a819e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM4TW2451834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005a0a85b985a235f6c79693e32c0ed6943e0f903715af092e30ecc0d3ae01ec. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM4TW2451835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23975a5aa8701cccb44c9351ebbd772f7eb8236f2f91f6a5e9ca7ddcfb896a2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW2451836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c9d3febcf50484850fb26fcae675ef18a1e3ed6622224767857c199d2cc388. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM4TW2451837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc35d0034ba493c25fabf807b524037f09009773c449615094989fd207e0b95. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW2451839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac77c831f5639773568badd826114ba105f903a888d9fc54840db9d4913d36c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QM4TW2451842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e83a94eb50ab5e67bc6d1ea11fc1b95b98547c5c9df4c1a9bc4879dc4be0b0. 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/QM4TW2451844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e32383a7ea929a4a7180c838e515772fee0b6215ec0c4355bbb0a4fc41a1a. 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/QM4TW2451845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c35f3b7b9d4e7fc0a54c09883dad2441bfb5f0f8fbdcfed3c44117bc4c2637. 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/QM4TW2451846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d859449d4a072e8b44e27eea6c9b906f50c5f30339ecccc2165dabdec96791c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TW2451851.