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 0xad54747e250f41bd8f8a9c09826361bc08da1671725edbc6451ec12acf26471c. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e3e9d66-f666-493e-86bf-969bd6305701.json and https://artists.proofprofile.net/proofs/artist/7e3e9d66-f666-493e-86bf-969bd6305701.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 0x17cd6562fbe73d67f82a30b1b006256664964e766b322d681f46fba40b02db7c. 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/ITS782000462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba6ff7a89f8df619c7eb38aa8d709ca6c289e437c7e6b485ac69fd3c7d3447f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITS782000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a249cb88f332a8203e1ae861d0d18c0b86a6f1e673a79c79dc2c96b45d2fa42. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/ITS782400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0751c4a155a1d84c6009d949b99efda1d01aa157d3af4178cf15cd1da8bedc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITS782400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855fe0150f9138a6ed098a729c316db73d70ec48e8ac17cef4162a4b33328f47. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITS782400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d2fa1b66402accbf37b5b2e842ef88ed9e27e4bfe59bf29c1c3ca3edbbbfa0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITS782401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a0f34c9cfc64211b91ee6222cae0fa30e3db3bba58e1efb15f4f7af88e26a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ITS782401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4749b419ba95f2d7d054cc42008fcc52879b3cc5bf85236241c483bc10f7bc7d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ITS782401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927bb821c6590c9c042f01b5d01afddfdf57ac10acae5eac8c34916e3d618501. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITS782401850.
Autumn Serenade (Melancholic Piano Melodies)
Autumn Serenade - Melancholic Piano Melodies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ac10412669bad43dd56bacc1edc14e9beb3c52985ef18d61a278de97ed9342. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITS782402117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafaaa5c7a4fe356b79cec64744a4120eb7d4ac914bb73b595b01e90f4130a70. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITS782100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb0d7f9e5449b6f66f2bbe42cbc8b0c23d484b51061f176c5fc7b1120874b8c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITS782000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd6562fbe73d67f82a30b1b006256664964e766b322d681f46fba40b02db7c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ITS782000462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a0f34c9cfc64211b91ee6222cae0fa30e3db3bba58e1efb15f4f7af88e26a. 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/ITS782401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65dd98f6d3df61b8335ce30ad72123d410434768cb3299fefaff5945882430f. 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/ITS782300913.