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 0x3d08d6da2c637633cadba65fa3ef4820546334aba0674c74b0d40891ee07b3b9. 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/cdaf3681-6397-4fd4-a443-02ce29ee30ae.json and https://artists.proofprofile.net/proofs/artist/cdaf3681-6397-4fd4-a443-02ce29ee30ae.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 0xee2dea83b760b5efd4e47da1eff05ac4cffc5a3c7560497f10c2269a00b5d617. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWW2487924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85327d0b256d776d1c3a592821db586e1c5ecf255797bc520e68420d1b560b25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB82446364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ce6579b7ac6b54150b118abe3946eadb682a7dcd332f3564906d6ad2831f32. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82446370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c7f3fe789320755ec053754053d7013218d61e6ee055a0f10c123821fdc35. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTB82446374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d63f32a53040eeed4aab4df2413fc9830a2d4d35b55c57aff788a03dbe8ce. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:21:26Z), 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/QZWFT2531600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1252adb994e1e7a2e567654af2e15b0941ae9fb27997c0df367df305ed5c5d60. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ772591948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1606cdb3d1fd468ba90fbb3deda5d1072ae699b66c866ab3e89d6bf9e630a8b0. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZZ772591952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8add3435dbb8782df846b9c6bb44cb433d692c06c85f5a8e461c09241b88d7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772591953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b758ed6da13fd1d073a14aee02fdb1f605b9ca231ec15f1cfe883693d9f76. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772591954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac838997835a973186be91c53876fe7f83b1bf01048f7e4c2c087fed9700990. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ772591955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16e13eef7ddf29c95c0af0cec5ce40a6473d49efc59cc78d988f4f9404f0c5e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:37Z), 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/QZZ772591956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e53da2ddda8d1901495a122ba09a7411ca355e3e1952aa89490d8310045c7e9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ772591957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c7d25082c86ae98e6ad7d85be09f1f0909203782293c158eca296a3b8860a3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772591958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e0eac39da1a108705e7d90d1a40a74f9f7bdcb694f74557a4de6cdac00fae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ772591959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d55e9255d2295325922383723f12068db596cf86fe09374fa7ae151100f95b4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ772591960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a15aedc3a5382cb0e498ee6ed5b2bf1320082b45b74a2b73d8237430029fb5. 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/QZNMU2418221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01287b38650e45058cb15653ca6fde1797031b0fcc792c4558c4f328454c4859. 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/QZTBB2482460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46064e14abc5a54b05006114835250725942dc42160b4600b01117415cee1c9e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTBB2482461.
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