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 0xef9c07996c2ca9d3e5651c109d5b3cc4cd6f13b718da36ca99a3e8a6723b0590. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dbfac7f-3161-4ba4-a894-c32c87fa4b79.json and https://artists.proofprofile.net/proofs/artist/7dbfac7f-3161-4ba4-a894-c32c87fa4b79.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 0x617c52b4fe55aa44f17bf2f04009fdacc987ea8383eff22300139ec54007f19a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPA2436309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0cc45411347025c8a76397401e63fc4f2ee365e0bce3064673dd37959d417. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPA2436319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca66eebacc8dfed5fd9a8b87cc5bf969e1f0aeb0ad7a6b175844b8f1af3ecb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPA2436320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca66eebacc8dfed5fd9a8b87cc5bf969e1f0aeb0ad7a6b175844b8f1af3ecb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPA2436320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d86289668cbf4ce64a55d4b5564bc809e7b7feb93e77305ccf3d5303d16fe5a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCJPW2314784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a377f1d9c39ef8652f59f8f2eb298825e99d13030739bf4c8001ff1dc04def6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCJPW2314785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6585e3c5b584b4ada05f057180c0874a5cdc94aacd167591ebda06fb7bcf7b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCJPW2314790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a40ce091c39b0a8509a632ac9c6362bfa2c34eb4a15aad5d461312f29c7a45. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCJPW2314791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ab30ba229c8a238de2dda2b4652c8b10426f1a94887994ac6cee1a383eb12f. 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/TCJPW2314793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0d1ba59b2a32d41bd8bed845c5a67f3d1278fdf6c802f741390e5cd76ea60. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCJPW2314795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21094fc204df82f98588f59da5b880f0e6486404e8506ba15d50ad926fe635dd. 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/TCJPB2414160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a862b1ebcf9bf8e264d2af778ef2bfcc550d434810f95ff9d5ab9afe5c2ac. 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/TCJPS2231578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d21220103e62bb1a98faf6be5d3b93dacf4bc20d3985cba8abf407b6036c59. 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/JPR562200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0084f3a851d7e5c1c1f5d82082d25ea069be40d1621db32c01d435f2e85c0cb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPR562200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc07296c57449d7da44097764aee1f5dff7f2f91c084352eba6e4944431e84b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPY2301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32615659877310d4d5b256029f4808312b4c107053c3933acaa033f0866d9684. 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/JPP561100893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf6e23d0010ed5e430e6e8e5728076f96f867b46889b47dcb5d67ab0a34c6c8. 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/JPP561100905.
Tone Sphere Original Soundtracks - Luminous Sun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb8d985b0a0d6fbd54e3644e7ef7c15dcb0730b9117c0fea619b29793367499. 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/TCJPJ1961488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ed98bf4c43d0ba3bcbe447bb81f655ad1fb59df26dc0d764235d25e13bf149. 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/TCJPI1983114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f790f1694077a086fe6662ca38d8c489ffb192f12afac7f25c0cc4771494ea0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCJPI1983126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e51eb3ebd97de5bd40e57f59aee30e7e42fd1fec9421b4969a7068d9dd3fb0. 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/TCJPI1983138.