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 0xd440fa06000f1903e76f09414610d22d1ceb9ad990f14f7bfea3165ab548516e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a71c94c2-f1df-4c60-a91b-ccf8b0c58b8c.json and https://artists.proofprofile.net/proofs/artist/a71c94c2-f1df-4c60-a91b-ccf8b0c58b8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rainy Night, Soothing Sounds for a Calm Sleep
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 0xeaa49f6fdb29bdb75ab0422dc3e4e0e5a31c223e720609ac7a71f5f7859b3a5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c797ffd54731e0865ecdc714c6531a549aa9786d657c41d5ad5f171b5180d65. 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/QZAKB2374354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a5cb86e2e079c3d7a25912efed8d1431249248a33a78e5ea7a54370114714. 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/QZAKB2363799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a67ed2bca2a5ced2dfda37ad29ed5758c64b108e143c1151d51090e82372b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2355136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f6a4eb365c07cdbf22894b8886aa6e7f317de3f2c0a51af0edf008afdabd44. 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/QZAKB2353010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51faf9753342fd799ded1983685f0b24a614900e6a911d2e299d50b3d680ce2d. 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/QZAKB2345960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c93e9e81e41d9998af7f1f78730802256b0ff2fc8154d1295bc945cbf42db. 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/QZAKB2168347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e060084fda0d39bf8afec0f8db026ab5868902473fa4ee9b827961a1e962bd1. 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/QZAKB2168348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35b23025d78fb8fd699d4a3132351460bdeb643e54892fdc9ba89ba61520c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2165299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160231cc554d7cc84ed7d477d5dbd7b424b49a10aa661bcdb652872a98349f3. 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/QZAKB2165300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496dbb36e3b8a5b22c6596c9c5b76424f495dbb60094d7072e2497f3c62cb750. 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/QZAKB2155490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8adfc196331020274c483c67d50abd5d3e7f511b84bf7aa97d667458d3a79c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2155491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859977ae37b613c4aee09dffa5bcc141ec0e6b016991a2fa8326972af4337e1e. 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/QZAKB2153982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8cd52e050838da2d4d0ac4032c97214644040feaeb3c1587110d7b3cca2c66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2153983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a2a2deea610279e2e7d635fa123aebe76aa1009c521133be140e66c4577d29. 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/QZAKB2101672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703a87b3089c4bae87d99a4f7469e27070a075c5c3b9dabe10c9543dd1554a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2101673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4060eaabe69c6c3263c44cf1d97ba24cf8999e965a6fe9c93b13615e08119373. 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/QZAKB2101674.