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 0x6e5366c1f878c89535837b43505bf0b5fd15312266101cd9ec462757cbf9ba99. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8337a65-a5a7-4d00-9573-cbc061bdcd35.json and https://artists.proofprofile.net/proofs/artist/d8337a65-a5a7-4d00-9573-cbc061bdcd35.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 0x5e1fd415d11f566edea6b0759d74cfc201e8002759f1ccffebf4cc868764ce5f. 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/USA2P2028601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cb99d569d6985009dc56608a568fcc748eb101302f84a3f29e5886307fa175. 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/USA2P2028603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32787b3d18b27464fbe57434990c3e82f1647525f70271daf5999a48f9f649dc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USA2P2028600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69869c995fafca6ee004214c396fe33039e7fa1ae9348bacf73d93c5ee8d9f4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA2P2028602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676c850bada7f8866c2797883deef50e7698896f78b30e0c43857a62c6b4818e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2P2028604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2201d834c7dd8402ce55fb639f02dc5378cd779b8e2893af9203847040293f3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2028605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5170c42bbff69b8132ea21e87d5355465524ba2ad742cd4a80e28aabc7d1aab0. 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/FI3FC1830302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3d343a07a1862206b8a058b8e84792347fdd3fc5f420028d71d3aa3f7420e6. 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/FI3FC1830303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb05b7f505ff9e3af7ec2d1dee1dc8c3aac4deb27a2c8fea8bf7856e2a87ba1. 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/FI3FC1830305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7874ff3ce20b774f31e797a6f23b80a894884f634f5f6d11c7553c5baf6c360e. 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/FI3FC1830308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc6832fcd1621025c7ac7a6be46e8a7d406d908159deb293d0e31424dc674a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FI3FC1830301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1220b100d50c740d51deca34b41d75355f8a747b21f7a80b0537e72c4a46a612. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FI3FC1830304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc406e5732838972432dec336677b0c8632c5ef46b37168b316e6e83a714809. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FI3FC1830306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f9be48e8560a006e47e8a33de3aa39ff516350e33bea620c9c6cb31243021d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FI3FC1830307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abbdab0f5503ca71b3f61e7908736bea867cecf6382404a1a9b9167cf3cd267. 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/FI3FC1896801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897f97166dd53e336b1bba28f8254bbc4c2b42485d02b9103282ac381e3cad84. 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/FI3FC1896802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e74fcf04f0e2737925fbbc3095e2a1b0063399064d62d903d8ce1b2e6b8be3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FI3FC1896804.