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 0x655dbc7e04e83bd162a1c86eb143d98c72fbef460d954b47674023e0e6ce0978. 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/55aca2fc-c9e7-45e7-8b6a-8a4343f2e483.json and https://artists.proofprofile.net/proofs/artist/55aca2fc-c9e7-45e7-8b6a-8a4343f2e483.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 0xf222ca891b04e9bd5b4ed6be697cd76e8ae808ddfd5607b81cd4fffbd331985a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/IT0960601829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346381d9daf7eca5a2ce16eea37980b57394ded145705be6deea7205270d2a54. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/IT0960601831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb338b6ba65d4d3e5a32bda4a6d8d9189cafe83590e3cab94ac143d74b7b2b7c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IT0960601832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cd762ffb157ed42c80954ffde08bd1fa0d89626e4381a38a83ae3732d88d77. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/IT0960601834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a767dd0b01dd8a3b8f31458ababc973f86b52cefe4245aefab57a6530740844. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IT0960601838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd5d0fd557cfca572127c7853b0ac5393714583e91560cb63f050cb9243a89. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IT0960601840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161dc2c5eca2a630c482061c7c51c6e6dedf9d0db9006bd13e4caf3a8e8183ba. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/IT0960601805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dadf67b595485502c21a2988dffa1df5d7c5a442f27e2e63a94ae97dda274b7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:53Z), 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/IT0960601807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb41b25812e39876c0f446c19fabd0adb2f43cb777bd0eb68c513a169469816. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IT0960601808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538595c50a156def1bdd821ec2c9c2d624b238d1e258a069cf1660a9682a27a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:12:59Z), 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/IT0960601810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0633a59adb3e21e2bd6c94024c99c71b4e993c425a4e1307fb79b43bed258cd0. 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/IT0960601811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d3f0bc92688f13cf93f3a686f41616d9f46751c8819357fd7bee180ae4d3b5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/IT0960601812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5a1f62782c1a46cd47d50421244445c8ae93278a22af969ee6c438c13073c2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:47Z), 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/IT0960601813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1fb5111dd1766584e28b8e946f9e5afd83e02926c418c2dbd08fef330e0b7f. 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/IT0960700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295192ef6d96481645df1e347b782bb4e69a1fec5f962ca5f26c9367339d2d70. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/IT0960700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ffb8b8d8fc62f00e0827a3a10ec937511aab5c1ddcfd24b7e094c22fc1da0d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/IT0960700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3379d886683b77e50925dc6c87d32fb1420b332c3eb1651b4053ead763fb9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/IT0960700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ecae46c3f435d9e5ce6483ab6e97c9bc22e3a2c1924b2c6981959c2edb256d. 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/IT0960700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5297fce4c4f1524f9dcae2e94f9bf3bdf228bd1566ecd8f84b25e9fccac5d7ef. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/IT0960700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3bc5c12d5eccec335dd3ff410c89653793a0c6fdcc7e9db945fd819998539d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/IT0960700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d0f50f3137c285ef24a80ab52e832fa36dd77af3c0621a02ba7af6d3f417b8. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/IT0960700138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c96267f6b034b16e513393ddd7e715db76c8f6899605a1b2c4297643720346. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IT0960601841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503d0c976cbe061b976f30afb14f3824f61b1bce72cb055218be3737abc0a8f2. 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/IT0960601842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2391228262f11d24d86aa73126e24a7cc433ca9b6a1f6e6efbefe2fe535bd9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/IT0960601852.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb68806d4eb30e66582f661931f7f97e9964c12c94c6d961e157010a396068f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IT0960601854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cefa194cf1553db89d709a8d4d3a7f5fc542b20a72c655afb913c5168b0144e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IT0960601862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7e2c7a7ecab9370b34716d46eacf00c6ff1604888c607daa7dd8950f9ea76. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IT0960601864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08ed43aeffaf909d9375614065675e92bae85a2305d5a4a908086ef6541634. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IT0960601817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c15f9e9fcde5ff13ed837ee7e7bc332dbc88b39a451de45ea879c9a634b88b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:51Z), 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/IT0960601819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00ef2287e8c8a9969904e696ff7e6cb5986b777df9a2f73f4a87300eb69b87c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/IT0960601823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d838e3bfa75cad64d1d408ab8c2e1bdb72bdbd4fbb13547e57b2b3ddebf9e1. 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/IT0960601824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5770aa13bff336060deb973ee17babe285aea73e7cff153bdfe0e60f7f049994. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/IT0960601826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a94edf5a4e7003d47f6e4576827d35aa76bca66841564c6586ec8fbfacd6e5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IT0960601828.
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