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 0x86b93bea19436f77cb84d2e3b75439a401dcd368614edede65ef204ba89d4dd6. 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/ebe6e2a0-4396-47a8-9f53-d8f075a73df2.json and https://artists.proofprofile.net/proofs/artist/ebe6e2a0-4396-47a8-9f53-d8f075a73df2.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 0x944643e2820531f559ddbdf2ecf2c620fec09e0315eb5396520447f252c1df0d. 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/QM24S2106034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbacd7f0c20b88b7ede280f605ff2209137eb2fd09ba9b7ad013ffbd8a995592. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X41999756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c3014109d4964ae490f39d214d2d35c34bd58af10148e726543ac867e460c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZNJY2303239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade90af88ff760cb8afdb4dce16787bfdd7a8a7b2730155f7edb53cd446a4137. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJW2357944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b78edb08f18f6104f139b26a63046fdc934440826eab5542a61eef218523fd. 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/QZNJX2372750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade90af88ff760cb8afdb4dce16787bfdd7a8a7b2730155f7edb53cd446a4137. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJW2357944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a61b83ff5c8525aaaeb9223bfd5fd67f76ba5a97d5f9757ec99c2e41298a639. 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/QZGLM2372966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8b849a891ee1c78987c858d7a9d177ccb66ac63a96630b989b0bee697a3b31. 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/QZ5AB2355669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad9c6af04de46385ffe964c4cf4c725b40f861f10495decc9c44a30bb2292ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2323444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9c46cdac9fecfea2c10bd4f7ec4a5963c3bcfcc10e17e2c7bed6ca2c2af66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9M2263318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd71f75646612ef683b4a22d4b6eb147b0c2de6173ad9c1286a48730dc569e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2107127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5444ce17e804dcc07c25cec656c13a7167aa86b9d3562beeef1b663750b30d00. 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/QM24S2106643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00bcdac0bbc3588c477c0b2688a5c097c7ad82983a1c23378290d3446e5284. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM24S2106642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d2f568502d6d4ad4afeb4eeedc561b2975dcfa0ed18daeab69026fa0568cf2. 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/QM24S2105415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63caf8af621c6b1591cb49a2a025757c9a7f0af3e6e9f11565d7377f2c5d6efb. 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/QM24S2101111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5103091d1d6b7c834bdf110886a910451bbb416d3ec1cdb500e61bf4d0cff5bd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S2011781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9b86ee8fbadd8ba2a5ce9fc5c3967b1b231b07264e717a83156812ed541fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2010206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20be9fcfe5f47f3e399fe910d3da25adbf5178c1425734f3db1d0da735fc5c4d. 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/QM24S1927197.