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 0x0dd3859eb8b000b15c5c67fb142180e5a599ba45756604f4e11adc92f3faf493. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86db9081-6d74-4bac-88df-7ce87b79c4cf.json and https://artists.proofprofile.net/proofs/artist/86db9081-6d74-4bac-88df-7ce87b79c4cf.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 0x3b7006b69fe420dd8b91a2b56fb36569d98dc424c78c41a324763c4b0f24cb71. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:25Z), 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/QZMER2150635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d09dad5bd070fe081cbe6180d34f25a5152d4aeff461d2f4843f887846b9d. 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/QZFZ42206379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362bf6f0d657b923b887e9fd7e5ae37df164623b4c703367a18b667f830d5f4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:55Z), 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/QZFZ72282298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7749fd44907b85361706ae07ca9ecbc8cf148c6dcd438d1605a65e677a47ee7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:04:00Z), 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/QZTAY2229921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f1acced330c757eae44ddf3b2ca648ef7ff77727dfb6329e0913635f3ab432. 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/US38Y2305497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afce095da34ea51ac4120e82bde38ed5b4670ef760ed9b9ef372bcb5b34a153. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US39N2304771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3ddbab6dcabd817407452a7910b858303d10f4e8bd15c1272be590c623edd4. 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/US38Y2305499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5555553e861a673a321b3d01a3e16a47264bdb61af1394653ab13d351cafff0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US38Y2305500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579194666e640f8d098d265979dd824776270d3e6646dd24a3ff4da02a278453. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US38Y2305501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad16fa154314e70488cc65907a99a475c3fc05f1f7fdeaf06f9911e28bf42ff2. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US39N2309343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1dc3112564aedbd6709a021ae998fe767fb128e279b4825c329a9625e1f54. 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/QZHN62475335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750915ae8d05a1cf7d7073ceea446f2a36848058d6f0edb542277cd440a037f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAS2469266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341e3e3ed3c4a387aaba41798bd12efa67d99d6dfc863b002bab05327c75a18. 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/QZK6F2443124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750915ae8d05a1cf7d7073ceea446f2a36848058d6f0edb542277cd440a037f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:11:05Z), 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/QZTAS2469266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341e3e3ed3c4a387aaba41798bd12efa67d99d6dfc863b002bab05327c75a18. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:26Z), 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/QZK6F2443124.