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 0xe72e41a0ab237491b5e9ad553b265f02a0d8cc7338ad6f9c4f7358be0d390407. 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/28891fb8-adc3-4f97-9e9e-811776b3d728.json and https://artists.proofprofile.net/proofs/artist/28891fb8-adc3-4f97-9e9e-811776b3d728.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 0x1f143877355f15766cdf0cf8a58439675691363d4d80defc097d982f2634f828. 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/QZMEQ2447240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16a6179af91eb65bd60ea85fb8d83273e706d1583ad5c1ba0eaecd64865f9d. 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/QZMEN2444808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d5cec5d79fca6d42ce107b8089b87f157da6a8d7a166c3c3170aec96969fdb. 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/QZK6N2301159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5621fab3c72694a9926c9914d7d3c601aedd326c787017b2316f669da6549c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA72348352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2a8531061de892c0bc9354a9eca057d050d865000938dfd3bb725f7fce45e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92229303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b404fc3b911c4c4f134c7152ba1792d0a3260e3dda58f8a1dc82b2c303935. 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/QZNWS2102591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260d3b8cb8424f57a8d3186aae6cc10effcfce564d4c2c7f9588389372b9c80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEQ2102752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26f4027dc1ea7af2384390dc4635163537e1f7ffc94e848d5b7110896bf1b7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZHN42107229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18683972327cc5c43b675b1d26f50a70a3e2684fa2f44583653648d3a1e7aea. 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/QZES52103487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c00f8b13af72bc8e791fc4f297275fd232a0b1cec6999b445d9e68f309a1df. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ72187060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec5c704bbf35b29e09d6da9c03e29de5e626a45e363859ebb00b0c64d0401c. 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/QZK6J2050890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7b37543f3072ab0cba1dd09c9ce0dc22259c4a46c90564d0397fe802ad04a. 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/QZHN92054948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f99278914a1ce3f06b001903aaeb56563e2534d6863f8170a8e9baef3f7153. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYW2022550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973c2cc84bea07abb608cda181e1b3438224546648d5d10995daec52f81a273a. 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/QZES81908011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1b5029246f463583c0f6157858493cf0db41fba336aa97f9da1b890ebf3d5a. 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/QZDA61972628.