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 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 0xd342f10284d96057d94e46d6d8a2d8159e57c10bda9fc9c241502d79fe8e0a3a. 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/b7a718fc-a889-4352-b3a4-b08b25275485.json and https://artists.proofprofile.net/proofs/artist/b7a718fc-a889-4352-b3a4-b08b25275485.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 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 0x18505f6755df765652696f906b8827c8dfb5227d4ef907dad8e9d690ea209f73. 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/BRGPR1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62749763f6170de5b7742d0ba590c01464cd0bc31f8a761ffd272fe531d2d6a. 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/BRGPR1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22ad5c5c369b235d3f27ad1ac6401e6913f06a160a92b7c6aaee9165e79a7f3. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:16Z), 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/BRGPR1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe18af270d80b895c5d1e1349938156733f802469d95c6ddeaa10b16f5bc40ec. 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/QZWV32360273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ababe391c872731f2d736a4b294c25b297fe7c4390fce28078a40690cc63896. 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/BX7SN2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302d5b5732d9d261a0f505bee36d3d6bc0411f237191e588f70cc88ea920666. 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/USDY41901099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f4a91a9f2f2d7d43f2b89f7a3ff2f4b56534b18e02e351438ba4502191b85b. 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/BRGPR1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d04bf166e22ec5aa9caf0e6e130160de5b1ae8a3db2db6e32349b5399d5b170. 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/BXDIC1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89ff6ef43e5dee86af8312d7c45f9a186353744db68a039eb55ededf7b92cf3. 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/BXDIC1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585672c2a708cc5a48beb633f646641dca5f25c400e68c36c082126f5c136235. 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/BXDIC1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9e524d41fde7fc19c4e56babf7c8b06f27601a597da14bcdad3d856dcb6c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXDIC1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1904c700e6fe6b4fdf46a342fb34622cfb2abcce75f15a7e7ec99501cb8a5. 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/US7VG2415470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1108f30f090cb729b10f2ce6af20beffee504226fde0c5d15f354ce7cf3cb2ba. 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/US7VG2415473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6862835da211c242a76acc306fec6ccbaac9cb36783026e5c313419852926e45. 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/US7VG2415478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0848201c155af087f04d33e12a47e2abdd1a0fac6718f01aab7bce09bf50175a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:20:36Z), 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/QZW9L2474294.