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 0x9bb2ad65fc0bc346d420a6288ab62aef6ec022c9c377e7ecddea4cc9bacae7d4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89f2a559-4455-4289-bd65-7fad9d06fc5d.json and https://artists.proofprofile.net/proofs/artist/89f2a559-4455-4289-bd65-7fad9d06fc5d.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 0x05cfa6cbae37783d0f7768068d5832238aa8318f9a59447be3c70bb88801221b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT4K42553305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918e840278cd14b9bb0a57ecd2731a50beb0cf9d28b93413c3b987ce86bbe439. 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/QT4K42553306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad1b705b1d346d5bc52da1e435795c3b9f71f9331ecefbc0037d7bc815a9d4b. 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/QT4K42553307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ce1a1253037eb5446e3c1966212be6e4ad819185dbb35ffa7b499e5418613f. 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/QT4K42553308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb1a62e46449b8650c9e8faa096ce641d32f63de59b4f886abe398554efe89c. 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/QT4K42553309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475a141b0bc27abc319aa0e6ccaf7a4814bba02720470d6a6f135af8f1ff1b08. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K42553310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817a5a2c5922bfc7d5977e22b641b18786ef9d64b0bcfb6f07d48104776c4529. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:06Z), 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/QT4K42553311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469e6e04f7971a84059c38c38bd27e3889f6d429e3301c6ff367226c7aabbc7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K42553312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d802c9f4c955cfe16bbe57bd85beaa0b1c2e3d5c613d49020c0b2af4c9db015. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:45Z), 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/QT4K42553313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3322001663e698eb7632cd3ee8a3a88babfdd0d681b149b67e51b2bdf9162e. 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/QT4K42553314.