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 0xec93b972d140f932261445d8ac896f33dac08722acfd4a1aedad92f12cc97240. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/782b355e-7b25-4a34-a775-38bb65da1ee4.json and https://artists.proofprofile.net/proofs/artist/782b355e-7b25-4a34-a775-38bb65da1ee4.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 0x9eb997b0b60bf0fbeb35db7bd23c692c2af88ec82f242902694531f56b7b43b4. 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/FI7RR2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904c0f8ec1c32d9f29b2a8de00fa16fa9bba5165201d632ae19e29d75dcee4b5. 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/FI7RR2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9544cfaa2425890f8206eca7566dbc849b8fb573ea82d61d5329d1da448ffa97. 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/FI7RR2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea296e582d888f03806cc2d5a34be66a181e867f78e80519f42e90086bac6b9. 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/FI7RR2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50816775efba8437b242232bc6f5cde8772bc68eb52a4493132a89f1764eaa. 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/FI7RR2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d9a4499392178f43d828703853396744c7496ec606b64397344dd29235040. 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/FI7RR2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf656fb89c7b58ece0ced6923f7fd7c23737507f2f4bc01340ae551f603da4521. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI7RR2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20681ddd9ea8500c3693508d4bafce12295da397d89ef3b19ca7b26c931ea96c. 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/FI7RR1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a30395b48f9c2df87aa0d3298dfe3b590884006e60e8c6dfa3cdc0dceb8f27. 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/FI7RR1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dba79bb6b04019b26ef29bc5ae9fd0e1de07c938426b10b05e2ce283ff0469. 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/FI7RR1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d697b8f43c04e0b3c9bcb49f5d850c7bc0c97c52b83f34b9ee89b9dd606fab6. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FI7RR1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e8d179d1a96347cea4e1a60a533bec7ee83f1560aeaf564af0f612b501458. 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/SEYOK2422961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f3c498602faf7a7115d1ef068039ddc6a240567ac1dafb815b91c0302ca0f. 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/FI7RR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50816775efba8437b242232bc6f5cde8772bc68eb52a4493132a89f1764eaa. 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/FI7RR2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bf478324b0657deb8b3867df102e92e7fe61ad3f16266407ea3d3946ce9b5b. 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/FI7RR1700033.