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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0e76e732081c4ca1573c2b564212d7b4592368eb00a90ddcdd30f3aa63080. 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/11924f68-1d84-48ec-8a31-d3d052f12595.json and https://artists.proofprofile.net/proofs/artist/11924f68-1d84-48ec-8a31-d3d052f12595.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa57d7aa59f9bc55fc143f1fbd052efa26461cbb631e2ba08d62cb3861f22e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USQY51590380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9a9913e501726debaa6004777e31eb6b5b96860196f9a13f04452f76fed146. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USQY51590381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1da1ef97f3db07524b067b2f6ed14430ae761ee1f21f210a1b52016fe72bad5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USQY51590384.
Spa & Relaxation: Sundanese Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e0bcef7e442c14902b11a16b78c0fe674d34f37e798a7c2998c8cb497ec451. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR6V82442675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce68baf51a29fccf22ab834a4df6bcfb99a7ef1b1296b61e0c6f3d7c3678c1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR6V82442676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ff47c1ad2a8440e00cb7e24421837c73e8c7a8a615d4cf4decf85e02e02dc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR6V82442678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1683b1c7d13b769c0be59f676a85d203261d559236b854955a362a1ed7fe47. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR6V82442680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901b402c716a58b2c6aecac34795c38e30a5cb87a38066a54a6af553dfa4f377. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR6V82442681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9227bda0d8afd07bf0e3eb1a8ef9977b8163110a03e9c9f147ab6bd0ce0a9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V82442683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd795d525345efb24b13561a8a59efd0340cdef87a301db24b003da02894d64. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USQY51593171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824bfa5c6f7af074868e81cdec87fb991bd48915885e316fa36c7b5b70d6dc2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USQY51593172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942d7be6422fb54401f57ca0e8f4f4f8e0198a4db3cbf5da5f7ebe4fb82d27c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USQY51593173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c861c0ea907a730e170923b391ea8d6e68ab4699d7ea5e7d29ca5712fae98c4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USQY51593174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe460a76ae83e64ca005318db7c50568a3df21665a77f4b58091652e1be7700c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USQY51593175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83af86b785039d4c807bbb120ddb615d3fa3ac1d4e2008ade67c89e40cb021ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USQY51593176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e4c2e70b242c784495accaf846ceeec0558616fad59fb8ddb2c507520ffef. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USQY51593178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63850ec1270a42f2045a9486532e6c36958d3fd7e5661d645c4af6b9ba7f9f. 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/USQY51593179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d407b918c7215d10a69da6dad5f4fe77ee424db083e9171148d11db7a486b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USQY51593180.