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 0x4c780a2992dc04ad9facca391d828b565210b8eeb2ae9445129fab804076e31c. 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/821f6a73-9ad2-48b1-866c-1cf6b2c28da1.json and https://artists.proofprofile.net/proofs/artist/821f6a73-9ad2-48b1-866c-1cf6b2c28da1.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 0x5eddec9cc5a4478177a44eb3208577c0c5860f39d5f546eea01f2c56f5f768d8. 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/USLD91700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b185701eb145703d2f64daed8fb6ef375f77df599b9301264fdad12932fc8. 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/USLD91700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d06848b0059f3aad3853ddb79ac389dbb545779b8f1d8ee53300e191e7428f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9880fa818c7e9f2a929a2a1bd9fc7be3e2d95cd2a6a9199cb7c0437c1aac677. 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/USLD91700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345d52536464512392054f73939f6fbc2a81c54ce0e2a094ce3968bdaeb69c00. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLD91702524.
Jet Lag (Remix) (feat. Lyrics Born & G Yamazawa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0bf14fecf0007cb20972a83859abc52cb04b67cd9ab8ecc43505b79b962a8e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USLD91712233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c9c95e70e33b989dd4d19a02b2a080f70fc76776ca0a643e7e7070a0cd9273. 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/USLD91712491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30757e9bf6260846ccd3a245b03e9c5c16eb2836acc8c3fb7a207173350ccb92. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USLD91725440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9659c22c2979c02ed97d68cc57b5a5d2e860f9e859b06682d9c78e55bf062eda. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USLD91725447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212bce77feb8e14263d4918d6eede8c5f6f20d8ab03504edf0109ec89f72e08a. 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/QZLBC2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb593612c3a76387f5c965edfbd78615c454a62989b3c853b25dec396bc9891e1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZLBC2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c9ceaf152c6d39881b01b17a18595342795a960cf4262190ac93271cce14b9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZLBC2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55387b20e1bb77fe3583c73c49c5cf514bcf032c3a0b45cf9423a1ef539d40c3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91721888.
Ancestors (feat. Donye'a G & YEAR OF THE OX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b6068137082badbdf5bc4219e955a4853cc2fe834d1c498b7f6b61527bf52. 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/USLD90819016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d2b04b8f5c25a8c633b12a11a9e90c6c5ff1bdf920545bd0aa49445540d47b. 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/KRB471801626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe450759ee15b7d18ab5ab88ada249429462e4026fb811f5c5755a6dcd07a3100. 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/QZ62P1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724b8c4586fc5d991081a28cd6caf9389b87864b070bf5461e390a467166476. 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/QZQAY2330458.