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 0xb0ccc3bded7b0b518c9199cf42e2aed76ca625954ca28c0188cde4d37b9dd5b3. 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/874189b9-a81e-4f4e-8f6e-8543a2c20ef8.json and https://artists.proofprofile.net/proofs/artist/874189b9-a81e-4f4e-8f6e-8543a2c20ef8.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 0x41fc7a9eccb7b4d39f66a3cba45005be04e335ab68cda817fdda80e2040ac6a5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:18Z), 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/GX3HH2192188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18df69cccc1a9d79ecb49a4bd0860fce86af3123d70e87c793ebf70f149d0c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:14Z), 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/GX3HH2192192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5f460693c689c7f0a5987254e222e5be040c8a79f0cc14b2ae2fe0c1b2ddc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:32Z), 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/GX3HH2193160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b26b07df83d14ba4071a5c4b4963d59327b37afd84eb4bfba0cd489c4987665. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX3HH2193162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92221ff9e87cba2fbf3cfc0ab68d3675849cac41e8cbef848710fc007783ffbd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GX3HH2193163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b9f932356b273bce5f8fb938add67ee3e23bd057dac872ea40452a5ff2b2b6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:20Z), 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/GX3HH2193166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b13e9e4ae7359c0d424a7071a8499c6b42edfafc1b26f2e282a7d69d97c049e. 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/GX3HH2193167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c9942abe27af129ea34df5562f15e054d844aa596471f3a578ec271a4deacd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3HH2193168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9233a747f49fe2767fbf4b6f49da4f66dfb744b01caab1157667aae7d4079b. 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/GX3HH2193169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45062b1859961786c0065a7e07454dc2b21ec45ab31c513cad9b5331f84751. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3HH2193253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de61edcd75c07b6a718a809ef871bdbaf2b9b236045b1fb62b925c23c3fa6c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GX3HH2193255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab338d942ec7ca8aaf236ceb978bba7b6ba9c5da6f9b0da1136e391b73731c2e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3HH2193256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da304dc3ca9d03e6436fcee9a8cb504922310acf5509642bddcb0676a29f300. 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/GX3HH2193257.