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 0x45ee464cac4f5d8830bfa3b974fcd3c392279a51b14fcfa25f0c360b7e4f4175. 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/c99be22d-48f5-4c27-b536-6b785fd13817.json and https://artists.proofprofile.net/proofs/artist/c99be22d-48f5-4c27-b536-6b785fd13817.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 0x6f46e75293f1ba9122bdf32461cd8bcbb3a2840127bd0e3ca8e695a55d968aac. 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/QZHZ42042696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cbcb971acfe76b93b380d345fc6baa60b2690d99fbbf9f50b2462126eb52bd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92071795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e28ba15f908bc990684bd7b0b21b24b3621fb25fe04b925aa4214289ca53f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ42186475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33294189a2c67b2b403d4704739d9cd16d22fab66c42a5a24a0af4fee35eef4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHZ42186478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aee4207d8d4c68fade47e4b6359a6091a0f4c40a4c3a98715e3eff5678992ac. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/FR96X2145798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb004cd04cb41ff730eff12213b36d0f512515c485a55099d763260fdbeea4c. 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/FR96X2145803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0057348e837a324d5181d8b0d8cea289071b3e1c921df4de0c0ef825c4b7ac43. 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/FR96X2145804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30153e94ec90e1044833a9d3fe7ccebfd44c31a0373c744ba747812d4b17adb6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR96X2145806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9c7366c19ae7cf7999e9159d6c1ee1849eeabf013e720c593ae7e7d34ba3c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X2145807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70ddbc384837808af2f94a9151026d43d79f1e92083589e5c62eac39fb0d153. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X2145809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfa76cbfc39e36e0d39bcc8333549b5c46bf5cba0472073dead6fdc4ae731df. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRXMI2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa87c505d94d1821b21fa2934c9e07b3fc75e6f45e1388348eabf661d2469a. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/BRXMI2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dfbc27636f5ed40eb92d6d3ed75da400f6f680c8884abb9213cdcc92899d64. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:07Z), 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/QZGLS2591769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478a7f25c8fb01a14f8d722c5a35e8d2e0f09aa85bd7d9bbe70e245f58b2c74d. 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/QZGLS2591770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4977020e85f1e53bd1911c28e28fc4bacbc236488a165d0493727f1bf38c457. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZGLS2591771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258d02db8f3b856816581c5ad482c0bfa6aa801e126d176c681d0fa28051dd6d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:27:45Z), 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/BRTW82500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f56a5ed25206c60a86d99cd720c12e452b991d677df42d93742498df30efbf4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BKNYA2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9785d682f5b966fc37db52830e0f1b931b4e8adc2145ecc635457fd9f3f75cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BKNYA2500001.