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 0x748b7095e8f9f20e26b9a4a3491e367e784b91510b842473ae4cb2c5efd72c5f. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5647ef21-cd7b-4996-b4ba-ed2b9b5a6b35.json and https://artists.proofprofile.net/proofs/artist/5647ef21-cd7b-4996-b4ba-ed2b9b5a6b35.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 0x85ee55db7d38634231bf2cab781e92469353fdb2b4405e0ea0f4ce37dc7366c2. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZK6P2525837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f9b878f54a4b150583f3c7ddd18040cfa1c8918f8444ce098770a04bda824a. 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/QZK6P2525838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ffb53be9180b8bb70ce7357820260025e365a27489f80696359d4f20eaaab7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6P2525839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e488ecafd3430dcc4d100eb4461f5775b239c8ea2082c307104d1b75a1994. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZK6P2525840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc2e23eb0eaadc9aa20e2e958912234324b0de0dd211d2fb2664e7e9f9a59b1. 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/QZK6P2525841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239bd0b86e7c2c531eb291b25b95a5903e1273663383dfe65d8e7da16f3589eb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6P2525842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074fdbd15992a96503ee5014b20765541c7bda80e15ac797786082760daf97a. 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/QZK6P2525843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35829f1147a3088c0027720e5ff99a8c5606a45572c560eee7891ba5f13a7283. 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/QZK6P2525844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1affbad3db53e46f20ec36df6b9adfb68040379d86d058a2b54410b90ce6b47d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6P2525845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8397199bbe4e4b5a439d8fecc956425d2a9a5b4653cb3f1a22b7b30d39d775b. 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/QZK6P2525846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9337f782cd8f26d0088fae8ed28bcb87b846d352b92546c42138180a2b25d9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6P2525847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff2bc5fbb3fc556f930d606eb7be6e10ca2755b8db1709f18e8aade9b0dc99. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:12Z), 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/QZK6P2525848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a127ce6b69570a5491792c4f294dd80dbb9c2751f996ea776760b8c9b401ef9. 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/QZK6P2525849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615a6411c1dc7b047da7dd5744a97fd4e515479899c953dbc73a196e0eaac99e. 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/QZK6P2525850.