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 0x5500b35f205884034c6aac65455dcad21c9397b159823ae0cb53c00f4aef3815. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424fe4e8-1e8c-4a28-9c3d-5b861205d17e.json and https://artists.proofprofile.net/proofs/artist/424fe4e8-1e8c-4a28-9c3d-5b861205d17e.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 0x338976e1122a37ecc7c376bc949f78989d457f2c7f8058972d734f093934daac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAZ2465254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe766cfcdd3f7bcd8e455186f191b9e06cf1fc7163c4f97cf9d579eef2959443e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZRP42403680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82b4a7d723962163755f76241742c58d1f38d73c824292a9001498241fcc0f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAZ2465258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c180109c65ccc177acfe17b072ee3580daa9456864c0300da5b9dca170e2462. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZTAZ2465249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ff829ed396086b77ca94d257a358e9ce4bdcfd6164a6f8a6c7a538593905c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTAZ2465250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518e25dfdf4a647317556cba64bdba6a4cc4339ec3b2d4788b6e32302cc479a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTAZ2465251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8500f51a24b0b4b1375a6098d1627f97a4ce1eb09c99533cbe5a7a98d85d37a4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTAZ2465252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d288d5471fbe77c332a2731c08a7226b2b0ef54c2b5b0147520056eeb2cf239. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTAZ2465253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cfb96a66a3b5e388a736483d0d75cd30b7f073aa24b3f3111b8d3b99144943. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTAZ2465255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f14241f065bcfdd557856db12fe3acaf884936aae380c0714982caa2ba983. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTAZ2465256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073c74abd1b559cbb4e23d9c0a0f5f1befdbeb4aa5696547c4d91ec301eafd4. 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/QZTAZ2465257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012af65ee9f9df279d7aa87bde40c88875dcab6f9c2f6ac81de94b9fca33ebe2. 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/QZDA42291850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc627cf7ebc4948018fe9b10b43209d93ea9e0e0e0d1fe5696c2766c44f6d611c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZDA42291851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a5eb6901cc7bb1a1b4cd2ba0c2183d1149e11c8801be14a4bb03a494311c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA42291854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea52e836d65eef4c398888cae8a7167f931d9bb484b9d3b5cafe48e65a6bdf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA42291855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e4f8d59d518578af8f94dec4f0310e1b469891f116b2ff37d31fb3d22e0be. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA42291852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50af8fadfbcc149a18fa99a0e40fe1c4f41374e455f85f57a5a5ccbbb019553. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA42291853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c031e1564858d36cccf62df04d6ee16a71cc79ce73e188d8b2828bf6c9a4fa. 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/QZDA42291856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe766cfcdd3f7bcd8e455186f191b9e06cf1fc7163c4f97cf9d579eef2959443e. 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/QZRP42403680.