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 0x1c6586815431a6358552e497518f3f06d98a0ec33b2419d1523eed4a005a1401. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c6fb9a-0ea5-4107-ac87-6ef79a8581e4.json and https://artists.proofprofile.net/proofs/artist/19c6fb9a-0ea5-4107-ac87-6ef79a8581e4.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 0x881df8642efa01008bc04f3411184f15c8c26326c7365a11dc3b992884416a6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMH92378565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398334a27ab907d328ca9764edcc59431fd38be51a41cd6aed8bd788dfd7161e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMH92378585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9898ef443e5d64b2c391022e29106e63cd7f8997e3e2bf3ee2a3f10c8d6f8c7. 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/USMH92378566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968951afe225baa9ab42f772be5f9adce316be1b127c80d70b04722dab1d2cd9. 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/USMH92378567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96be91c454e7b3d6b44ef5dce0bd7e012a0bd3f103814f5ffd57e1eeeb7347dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMH92378569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886ad2ad2ce08ee9b6f41fbe929c5292b0bd5b01910794e9e322c893e012c882. 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/USMH92378571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e07bff6c38b12d5b6a4143782a1773eb15c7a28aca2977c36fa94c7aa7c2c3. 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/USMH92378577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206b14d621cb26e68308b6ad6c6551a774675f91c67ed4ef0052cb48b1623fc4. 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/USMH92378598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f47234f463fd7263c7760e432985938c4b3bab149d548e10a30961fed49eee. 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/USMH92378601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471b8c5ca5c871cc2f5ea856d9bd8f7fb3d4ad84b5a87c20c4f4f6458448f69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMH92378602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8999ca158ad31e35c772b1473494cd8f93429702f594ff074f56d8452e9b143. 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/USMH92378603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0d7fdf7d15d32a66d487d66a236faddba82d7c1802d0e5fefa2bfe34c5de8c. 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/FR6V81380818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330116d7a96508990123459384ba4f4f9c044f867210fd501ff517505e14719d. 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/FR6V81380820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa765ba4fc28b58ac7fdea0fc2d5245a5e3d5b17a77c9e73633a645b06dd41709. 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/FR6V81380822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc15e924d0cbbf8830927169b37748092973adbbfb21a91169b4cb50fe202c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V81380824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee62881b67785cc008b0e498f19a96eb681411a600daea7d5bba6f722c19aa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR6V81380828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2a1feef5ec985056caacc3b601c45da55b54127e289d5d003bc83470b7fb4. 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/FR6V81380834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574da8f8a8daea3801219894c8e37f13fb288dfaca29a269bc43b51290c12fc6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR6V81380844.
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 0x6f23f5123eceebb41886e6e0f48eb42fc3e098e186e659993b856d5fa3246356. 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/USDY42345474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b846ef77dad167beb02ba1a5af206261e16c3fa0631a9ddd307e0a9124ac8a. 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/USDY42345497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180159ad9a91cc2a0afa0e27fd1bbdd2f84a786377765b8285d52781b465999. 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/USDY42345501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c4ae9ddcf5102f60bf04b4bc1eb135b19bcbe4855c20a8a980483ed3bac96d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42345502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17e56e944c57819069d72111182225ce45d7cc05a2e605108face9fc210e9a. 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/USDY42345483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738393d81873ec5e0a1995da98f5accd413f7b97b4d388e4b43b4bce2f32d4e3. 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/USDY42345504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f90ecc073c4e7431361f6aedc8bcdb673b683521c658238984c6928b6cbd7. 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/USDY42345485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910b3f3059088780908bc1887da4c85dc84ce7f4b59c8e51c876d6bff175719. 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/USDY42345486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b13f742142ed90bd201de5a6134767464c8516fe96138085b51eddfdba7faa. 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/USDY42345507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdd7d36c3775a96bef730f153f8853afec7608bdfe2bda1b3471cb6d6a1d733. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42345513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b601e8741c508fdd7c4956ea02d7bfb28a1cc49d9df3da8baf208d9caa18f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USDY42345506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dbe8c8dd9118e25af9f60e4d1b88aae07647f4880e6510e467e32731c6aca9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR6V80227793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e1523b1c2bac792f8137686443cad2f147ac32cb6b67d16e75e5db72b9327. 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/FR6V80227794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40253796729bb5187cb4e7da5beb99017c5bde246660d2eb8b0423278c37b976. 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/FR6V80227797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5c766d469fe4d61e6ddb51567737b15a44937cb37ed6e468a04e00f6f3d82b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V80227795.