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 0xb5665c532265f7f3bbe38df6ae6fdd1123f9b665e47554e05da424b79401ffc0. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6dbdf53-aa13-44ad-a027-cc8c244d430e.json and https://artists.proofprofile.net/proofs/artist/a6dbdf53-aa13-44ad-a027-cc8c244d430e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af4798ed28b7178c1062ce66aae3763b139a610160a71ec3dcae91cd0379bd6. 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/TR0280601012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b70f19e72bedaf5ebeec4a772f58d9b59a5ff61af248cc52c0d7c2b3a2b99. 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/TR0280601021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7d1f0077b104b2f2e25968cd61167f64a938d58594220f4bc961fc1291e7ed. 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/TR0280601016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e542453435dc3419f6d368fe0f152abeae9957b97c28cee6ac82711708aeb. 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/TR0280601009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f63158ccdd96ffc31834c8487db4d0667f872ae8b59e211693414ae39e480e. 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/TR0280601015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91caac82dab5e4f2e17c56a6cf07043890bd21ed245e2aed57872ada8714c1b1. 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/TR0280601022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf2992e3a070f528da8f283431dcb8672d4f9a5e77cf5cad888b6670835c2d. 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/TR0280601014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e48fc65721a0c67465bffac3272e178d2cf6492e4b1eb6f5c785c509bd871. 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/TR0280601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49adba2a0591797772eadc368664fba5f35f861eecc0a91d3ac8f6dc1daae578. 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/TR0280601013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde30ffbcc9526356e664c8fbc97bd0cf98d69d51d77963ff03d17582012f6dd2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0280601018.
Water Cycle (An Instrumental Guitar Trip from Istanbul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d3f93ce2ef38fa41e045252734502d3916130bbbfffde72cdb7a9ded9213f5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:34:14Z), 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/TRAKK1900189.
Sayko Ana (Saykodelize Edilmiş Türküler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5fb5fb76631f3c4228aa4ccccc01b48b45acf2851a2971ca15326a275a3f6. 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/TRAKK1800146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6870cffcb2cf92b8852ad2780393e992eca6344371a2184038dfdbfabcddac28. 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/TRAKK1800137.
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 0xcb18077f1340df5019fe5721b7536e69fd02c4dd5c854fba9c0e434f1aaf916f. 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/TRAKK1700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e649102af1828ff9464137e273d879729ec7ff50d58ad3506718655bfc8c5f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TRAKK1700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753388a3365d1240f9756dbf75326a1259df1aaec76643d13c99aef76a9d008. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TRAKK1700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99785fc4e3a7c2b0e2241d382bc50f917defa40ccfe5614b45fb799d5224268c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TRAKK1700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f7ba6e634cc93dfedbc22e11dcdae637d4b79b04f7b27b20223bb218006bd. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TR4951000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6279967e2a5d2ec0ee1760fe1d81527296ba299f6d2aef25d09bb900d9a21406. 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/TR4951000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e1ed543e22f99add75f579c796ea0ca0fe92b25deaef3e690a59baf42384c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR4951000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea838860b3625740e184491b3e46cc4e80b76a8065629def58288faa6d427e. 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/TR4951000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7bb00a833ac6becade69616240243ec8830ace117616afa2f8559ccafec56a. 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/TR4951000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca6b5db617bb4658ccf2ed3354ea2fcc7f950ad7d827aabd43d007fb08a226. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR1231400504.
Sti Gephyra Tou Galata (Galata Köprüsü'nde) (On The Galata Bridge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd793b0459b8ac6b8c0bf3925602df78cd114bc1a5db60f81d076e3d82089029b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR1231400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177736fa4174e798d44e3f87bfd37574342ab46e911bd6d9321e1536dd046842. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR1231400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b726932f1f8a40f615ad31c5de9f3e60eb6eb625f522abac3c537755e3d4ea1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR1590600231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4386fadf622b7ba0870b409443c0796c37c7a4b22150424283edfcc6fe6770. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TR1590600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db3c9e9f389c6289ef559329087fe7de6997fc0b68fec64d103a1d383faee8. 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/TR1590600238.