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 0x437ad5be5aee0e22cf671cd5773320e25921ce338cb9555c95a737590a9de940. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aeb120a-18c0-4756-b7d9-cc88613b8a15.json and https://artists.proofprofile.net/proofs/artist/9aeb120a-18c0-4756-b7d9-cc88613b8a15.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 0xbb9208fe176ef5274493184566f9f7089e177794b5fa23f1db8a5c043cd3c634. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US7VG2008082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a39f799d9693406b3c8109a7189f966d93d8a1069b01624f38ac1856f5cdd4. 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/QZGLM2075724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a47d5f34f0f934dac5ee0786781c0c35bfd074b0be5b7b1d679834185e905ce. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZGLM2075727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e221b02697361455a6926cb7b6813c681f04f9c8474ab02ae4c1f3c8b74b4f4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:19Z), 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/QZNJX2047779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e17d2d1eabed362df5e9119559976336fe4f85cb4b80b9f2d66a65f9e8c95c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNJX2047780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51051c57047617cdff9e53c131527b09e0cc88e6e0797407ad9e545e45bf2adf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJX2047781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f73876bb1d47b9f061aa9d2f37178ad7b3df8078c3e8d09615237b519faa07. 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/QZHZ52162282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db0c1a4c734001c85f94928808570ee132fbe81aef48f3b3de506459ea93d7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHZ52259351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcfba25406e8567af2c25aecef2e94df72a91fa09147a9615e34ea3e0b0f533. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:11Z), 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/QZHZ52259354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef48b597916f451cfeb2072ca4838294cfe522c773a7e2e944fcff10795180d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHZ52259355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da04b2ec42b1bcbddcf200634ad857d4e8d5139433263f53b0cea91b018c4f7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHZ52259359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c7b46054630f3f411efe2107af23a7ceb1b702ecbe4fdcc75e2f634602f0b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHZ52259362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbb6973816fcab5cbdbf608c5ce966c21308fed72efcacba2c1c8120a5a861e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ52259365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91f2450d64db0e22a65b0918627441daa841b5a47a4145c11a09654082cfb1f. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZ5AB2303334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca9efd88de6205caadc9be5a990dc0ac20a01df3a2067e17e6e086602f706c6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US7VG2467727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947aeb8c1cf203afe62bc290ecba0c2b07a1f00131a8cba190da2c49192be814. 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/US7VG2467728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f2ef0de8fe00b0467215215f1ab5262181590028d0352b908e4c9836216f9e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US7VG2467729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626bddddba0e23197bfbe71e176e62fe0e3c0624a3f733fe2fce040aba46d7fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/RUB422300628.