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 0xe74f9f3fa149b9a938b9d334317a221d3669094c45114cf350414f475c78078c. 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/b09c67af-673f-4f2a-9185-fe47533da010.json and https://artists.proofprofile.net/proofs/artist/b09c67af-673f-4f2a-9185-fe47533da010.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 0xad69bc781fe1ea285479fc577202e890173d6037f3d00fda59457a7baa3f6445. 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/DECG71526004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b44c9309a60363968fbfe465169988ba5ff2a78ed41ec12f565d513b3f2ab0. 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/DECG71526005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8e0c6da3a2fb002e0b95edc2c83454fafd34cda70426e98a0926c19ade768. 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/DECG71526006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab42db96e2e197d8337cada8fc5ddef9a3589adf2320cc6be3e7d015d340ef. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DECG71526007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b2e900c6ddbb4c0fe0873de37b9a2d1ba5583ebab34d282ea48cdcb265191. 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/DECG71526013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aedff186ccb233e02b4364888bf29d6d3bb7d9072022453fe1ef92f31b618c7. 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/DECG71526014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658732d822919feaca67760e82098ebb687e5463a69dd173338a255b1b4b6233. 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/DECG71528001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefacd4fdb1e6952283709c65df7933c25b22efd8691101efb87ace71ef0d8c23. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEU671602592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acda86e63dfad001a421b45bba305ecc66e78125d1a13d8788fd7fcba62470. 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/DEU671602593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585916793446510fa8325a31fe4abed12a6ca11b8a69a73c24c0f434c01046d4. 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/DECG71832001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3239a78889f992e1406b1db7f99354dcf5987eea791d63b4820c33930dd7ca54. 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/DECG71832002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc98d86098477fe977adb97971b38f0c3ffa463d89485598401da6ff7746fc95. 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/DECG71832003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc4668e7b866bdd0447e3b90a558e162b0370df23ea4dcb2dd048a5cd26f334. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEQR42101818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef15b75c9444209c0c9960b9f3ad837c068b7e08a738f79762750d87c7054c07. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEQR42101863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec47c0622c446559db93436b4546581753604c826120c04cd5642958a3cff8c. 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/DEQR42201886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431ef00c0d53e864c9a62499ea835c6992cb3e895b89b70463a5a00a7d641a0a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEQR42201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff7317f5c6eb9753dbfede3ba8cd1abbac72d9d9a65eb5cad7c6d952a69a58. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DEQR42302085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cff01da6801f6309191b23bb3756d2a1563eeccf8390349200285471cefb053. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEQR42302076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3a835f906bdaea0dbd51cbbd8bd3714b31b6df46e7abeb6c581c59eb09bdb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEQR42402153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691a2b4baa1fead674e850fc933f9559820373f4f5702c5cf09c59ce78b5821. 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/DEQR42302034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95db9dafbc3a6675d14ee843af75bec3c0959d43d8ef3e1fa28c9261286671. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQR42302070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691a2b4baa1fead674e850fc933f9559820373f4f5702c5cf09c59ce78b5821. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQR42302034.