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 0x48f5313951f01a21ad468a51f66e9182ca9405604f5d025859d82fd0fa85293e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40c431c6-4cb8-48ad-b776-d2b06b77b24b.json and https://artists.proofprofile.net/proofs/artist/40c431c6-4cb8-48ad-b776-d2b06b77b24b.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 0xea60b1083c8d152d4beccddefbafa9703d323eb57876794d4d4e4c1a3c85e2fc. 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/QZHNB2294484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d6ad48e694c6198c36f677a7c624429546712b27bc445fe234e59a7e40e09. 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/QZHNB2294485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f51d68cdd5769336b7d0b947249f0efeea4664e2437a141406d98a59bc01b5. 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/QZHNB2294486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f54450050108c3cc698fa6af5e36f95ebcc1301abe3feef99be4624dc3fbf5. 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/QZHNB2294488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f5c2123cd22565f800450da9e30e3474d6318b7ff8bf6389935493f461c2f4. 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/QZHNB2294489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d06d5dbd15bc66d2af5a7134989e01309caaf22c1572b7a507f910b324e795. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB2294490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c6126dcd2cb3c69be34e0a94c95a3ed08e444036c7e726c802e9e882b5336. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHNB2294482.
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 0x59f253e99888d07835d797a7fe145bab5dc53022ece2364adbe87aff37432cdd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHNB2294483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993f99618dc6e115b38419458fd3a333f6e2f5b5b9cfa6827b3d2ca5b750d22. 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/QZHNB2294487.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b738a01d0c474587ce14f722c8837f19f5a6ead12ec72f51c121e907ef62c. 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/QZHNB2294491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e539770e8b6780d27699fa1807705acd3aa0426277cc1b740f767f8916125de. 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/QZDA52094776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731531f8c681cc00912358d8fca979c6bdde09dfcd8ab59ce344cf85d0ca92e. 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/QZES52001431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbffb5046c7da201bff6c52ab4bc6941a0d0c67eb49b67a968690f700eea19f2. 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/QZES52001432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef196bdbc162738b8b47470dc765887c0bd674dd5b790a361bbb570a8619e0b. 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/QZES52001433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70d8669f06ec7ea1f1520ac2cb102420911c6593476bec8cc4187f315c2d9ab. 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/QZES52001434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7d4fa9de4b6353012905d653d3cb85000aa254b5396b57bd58f2eac875bed. 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/QZES52001435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0e77083f4db3e68ab23aed4ff814676d4faf17f28b713703efe3848e1f4fa. 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/QZES52001437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908304bfe1064fc441191dedb8b4cc44ecfd26e97e1e42c013c39ee6b9600831. 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/QZES52001438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f0b80bb86d7c313440e4dbdc887f1dedd3cd8886b5691bec7d96a248faedb6. 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/QZES52001430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210be682ed6a273f41b01f5d978ba718172e135e5782fba0c7c78338886d91a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZES52001436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc106c47feec57090c8134bb1c35b857ed302f1b43abbd73edc2bad0c400e51a. 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/QZFYX2198995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2645f3b914ea98fa4aee06b8649337f41db397e348bb48aa2ba98d3a17301efe. 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/QZFZ22210043.