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 0x2cf823e41fcc39feec6aeab29dab7b6b6dced1baffb87375235ce815ebe09e0f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45440698-c525-435b-b707-8acb2cf2383b.json and https://artists.proofprofile.net/proofs/artist/45440698-c525-435b-b707-8acb2cf2383b.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 0x5d2ecb4ccda73c6c7c6daa972dbf406b8948b00d9be87323b3b7274388e57fc6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US7VG2489062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114e00e5588dc9dacb912cdcfcba2f23044022ebe1ad4516ff53161c4215bfde. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US7VG2489064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ee60c03f6d22361a3b36433864d3c43fa6295b2a0f3e2b539dc8beb6a6666. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US7VG2489065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063890b395944698ee2274abf144e73826dac74c367b884916bcc20fdf14ab44. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US7VG2489085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4823f28345480c0caa24f96fa02c6c7416d1975be0ca046afcbb228aa950ff5b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US7VG2489068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bd41f8e4afcdeb2dd22dfee2c8fc6543d2147af8aed6bb126dda96211ced00. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US7VG2489077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6908b2a2b79d83e25a4973efad5e9a674e86fda8a9910c0469a7b9776973f198. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/US7VG2489079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c71c6f9ff2d8f684ceb267f874933c31a988873cae6d47f58d46c4ad35105bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2489066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d1696251b3da34843faf3e57a1b7022b79d1eac868cb2c1fca40da6f7b63a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2489070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1645f47ea6e4bf004c291c920fdffb12149678e5d99421f34f05fb23cd5c43cc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US7VG2489078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7fae0e5806d91cb5e775950748cc9911d8ff233e5f97494ecfa98dd11cd8e1. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/US7VG2489063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e6a0c6f646d5ae8fc9cbc31947b423a74eebb3fdd349b5b60947cff54c4aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG2489072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b42d7ae3a986b6f83a65db613960e91b60fbd9f6201bf0037812acd9851ea12. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US7VG2489073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbdea2123dfcf8da153368a849c4565cc9de30e2c28ecf33a8c66d70d27e2f6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US7VG2489069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746d914acffe5c9b4f7fa34eb9a1f41b028a63678416a06f30617a3c3d01fd51. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US7VG2489081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30780722e3b095122b5043dbb7825ad7ed9d8e332338f1f293985c1bf49121a3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG2489074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9767279a3aa088baa6d1d42551f64068f1466f757d60baecfd99b21682df66. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/US7VG2489075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9e79f2b2939b9537f4e82a71240c6c4106828ce4da19633b8670040530f75e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US7VG2489082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4f6bc9520ef0639600cf0c477c03560d6d6cd146c56ee99786afd46973a2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2489086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2485d5ce5a8be330371818af680ba0324b811adc023e3cb98db7fbdc9a02a0e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US7VG2489076.