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 0xa5c3d964ac3416a96bdac4f4e6daddbd5d5022d1c814803617c7d0e781f5c479. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f489e171-086f-4815-b1be-0d16b6e55bd0.json and https://artists.proofprofile.net/proofs/artist/f489e171-086f-4815-b1be-0d16b6e55bd0.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 0x3283f5b33089d3d0b6bf4b1bed02a48f3740edf4955f6183bd66ce9927ad0065. 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/ES71G1737483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1efe0d3755e14fa58d8b3e6205e7b52df98d27ab3ad8f852cf33d52693948e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G1730523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f603b43a2371bd6d7b913656a86a07b10767c9bd312349f2aa73e393c8e8a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G1737476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315a1e9cb4b46114c834b774e3b36c388bd8b3fea196ed5e207c321f9c9d808. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G1737480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8dcaeec21e9a46c97aa05fc91e3e86cf9ec6cc207c414868e3731176b2022. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES71G1737477.
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 0xef6e00700db6a4404a1ffe545c5a67a020adc41f569883b8e504331d4e011ad7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES71G1737479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b137098503baeac4abdda17624255205ba718b494d3223f89c628276717cfa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES71G1737481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb31c58f17efd24fe1c70c9c6f6d758dc72271ead6d0696c93b9918fd7951455. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G1612647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f1d842ddc1f185f8a3f3e9b38c0b3cac884c1d2d7c69d74826b694fc6a746c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1612651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8590c754ca7a9fef069a0047e60e26e836c2f0749ec04d6b759a22e1af1ffb68. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G1612653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f237050b11f92c8f3dd3c5ca53f824ffb93b20559c06f28337710e41a1f381. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:22Z), 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/ES71G1612650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c6f059009003ef25c739c901750d133ea18097622ba37b62ac8a26d1f47ff. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES71G1612646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ee7e70297d9601e451eb9916fa4a3b19306f5a77b2a93dfe3bbf5b8c5962d1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES71G1612648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee282fc4f11b54b285461ec56d2adfeb65bd005cf5ac98f72efe199f686124d1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES71G1612649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdab068ea82d80e0d255791584b3d7970d799fa6c1937008b2dba19fd37840a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES71G1612652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432dc8afce12fc0ccc47212647d42fcee02b59bbf8120712bd0c7b7afe16acf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES71G1612654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7b4b252670fde0014f13b8eef92a26daaad2ba25caadc6e83660bb00dc9b85. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES71G1612655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd282cc7f26dddf06f4aa978f31c8286a39cfca5fc87bc2e92f6c9fde12c668. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2336972.