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 0x8581e70dc74784a4c0c400d2cc7314ea715cef54fe918d6eee59a94c3f6a08d0. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b94d71b2-57de-4a4d-991c-935d8e02bd2c.json and https://artists.proofprofile.net/proofs/artist/b94d71b2-57de-4a4d-991c-935d8e02bd2c.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 0xb5d7b90f253a822f91e9e44b8fc36571b84005dc3746e3ff0ef2dfe3859615fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92389106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3020c2d5ac75158097f2d05f661557a5e30f803a2ff4c241af471140171d29. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6F2338505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f1d307821b458b6e4415b53a9e28317a4afd1e7ee7f32458d74c87ab29dba. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR9W12432341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee5a236f05bf1de930f810ec1e1b560fc61f9ed5c0fd35b630ee71d4841108. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR9W12454810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f1d307821b458b6e4415b53a9e28317a4afd1e7ee7f32458d74c87ab29dba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12432341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f3e122ab4f153a621dceed2960d6a6b87993f9ed4162ec2dd1ab5a8174cf4. 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/FR9W12454803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed51f4d3b17bcf737158094f0c1abdf53ac63b5bcb33f5923fd8418652fd685. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR9W12454804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa035c6ba3f628f933222351fa00c9f1277ac6e0021665e2c84b43bff4d8fdf. 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/FR9W12454811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574124636ce1aabb2e03cc2c84bd77e0c5370f3382ff4b43106d67c18d476d5f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12454802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e2d84a21a8782198fc018c15107f71a3ca30ac0a7b3696b54d60fb73ef17b. 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/FR9W12454812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90bda93251a37029f47a2dd49666db4b773853864fde9bc9a8d07dffc7beec8. 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/FR9W12506065.