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 0xe588ccd71a301f0fa45a2f5a984646a5c8b1c56709373cd2f9c5ab75091b119a. 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/f72df668-76c8-4324-a02a-0f479af07a1c.json and https://artists.proofprofile.net/proofs/artist/f72df668-76c8-4324-a02a-0f479af07a1c.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 0xedc00217452238d12b7b24208fcd7788c9803e13e5a751dee9a161a485bd0a74. 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/DE1JN2391537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a5e346c301f53c385c37264144fcdd4c15f55180b80105caf70bd9ed23e57. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DE1JN2391496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc872614c342ab573dd87770b35bef63f360c276177a886ea09653c066134af90. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/DE1JN2391499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c13e24de8f37e7dc37096f771d95c6cfd439297694e3d8ffb8f44c3d1de1d3. 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/DE1JN2391895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823caed7364de42b035a8e01a87fe3f26ad5c269ff84eb6e3fa5e61b0a280566. 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/DE1JN2390804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6962a9248c6f6c514b217ae8faadc763778f4f4153f0de3aa7cad9cab2ab6ffb. 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/DE1JN2390781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47699be3ac2d1c3a21e83a9d4141ecf67476fbd7f3467c3327f88523025a384f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZFZ72494224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2895899d9a1b4636904c02a13d87fc2587bdcea8c145b8a1098f0864d44ead4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ72494225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6a6ccd27b495ce57a5d0e9ee99ddc8dac511b8fa152f3c723deb0f79b7b6d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ72494226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774453a1087358053f70bd4a1fabbbf4728345be7ed9f6473316950dddd5a97b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ72494227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124c5069a26f5be7e3e7268a59f59b3462a08b93148c2fa159e8e32bf7fa1c2. 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/QZFZ72494228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84c2f58cdb6cc644022799ff271936d1ca6f4feb42aa95ba332bf14ef302e1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHNA2474453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62504ff97956a23a0319f56256b83d4713a4df907d67b1ebdb71e7218d1ecfb2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHNA2474454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526573ff84bb9f135566c74d568b95b9e2e00f07f770aee8352e57622db53d6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNA2474455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b502b71a3e3ef4fa34741f10efc551854efeb927840a6c68837c880f0cec1. 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/QZHNA2474456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c4a9f8c62d60bd421182f7e7aecdb9afe39bab57200a9705e4a88737258b82. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNA2474457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1b6fe9dbf58a1f8a6c2931dc2be68e546c1b54e7f9a081f087dbf7015059af. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHNA2474458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3645922ab7c00479fe5fab09dbfee3bb7c80a51d62242afc7c0c0e50aade27. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHNA2474459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471c795f5b1bcf241f9bf8949d98e69c74ba00df04787a6a1d1fe46dd81d81b5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHNA2474460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6e86f88ddfa457779ce5c3e123f346cbc87567ba9c5e30e83367678b12e819. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZHNA2474461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344eea59661af7d356231e594680c9b1cdb11b46c01bc42b88b34430e227ecf. 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/QZHNA2474462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c214bd2b467b912249d2b7cc70202eb0d3e33e5f3235711caab30b5b2e93675. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2459053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cba49df3b2a80d52c25d3f7831ec02d302bfded7df687d0119e832ad1c3bb9f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2459054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745511d743ca61fae301e4b53e15f6f227320f60d80e3a847c51de227861c92. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAW2459055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f7769563e5745531946bcb12f2b3f5208af3c53dbc60fd129f49169f4495dd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTAW2459056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ffb49530c0b83c7f2a98b9ae0dccb26488661f6f8524473618b9b5eb4c5a64. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAW2459057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c73711c606dc2b4a97fa4c4557bdae98eb9d876e8b35988cdd7069ad12936. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2459058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9ab8df00e07ce7eb353f0b578e7952d18a1eea75aa3b3cf47b909e9bedf804. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTAW2459059.