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 0xeeb32267c87d214be6d32f6e564542b453540ea542a0e715c38055b9347131f7. 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/ac98a877-73af-476c-86cb-6f3cc3b161ae.json and https://artists.proofprofile.net/proofs/artist/ac98a877-73af-476c-86cb-6f3cc3b161ae.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 0x23654aec70706a484d4b1e7f8deb23fc1fb4e1219dece07aec3e3ee2fff3e189. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/US7VG1995574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f29fff38dee270bd16400b3f4c3ca0cd83b8b598ac27d0c6805e156c4367b0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN31998100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f2c544e22b9221c160a27385853a7db73abc92a4039a3e8617b01e85c3d92. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZ5FN2132787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa45df331339fef84fac19fb71c6489ef6b458b82647243f4664c94594e3d90. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ5FN2341814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51df536d499c0d50955bf0bc0ac257338651136b1592ea8d0fa8358f93fd74fa. 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/QZWDW2397755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21710b723e6c26e1295485ab95600b7dab815c32fff64174fd45c29073a7b227. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZYFZ2317932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf688f2d2b26a7f1b7efb60e12e7b64b8f241c5205e497f9a7ba19141e328589b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZYFZ2313239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d403270259b58a1884e5b6f20074aa33aed77efe5825fda669361fbfa6e336. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZYFZ2313240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b6da56ebad13a19e78829c8317a22bbbc81f30ae1369162391ca7a3bf4197. 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/QZYFZ2313241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778040a66596dab72e8d0cee06d98db6822348f7675ce5bcca2b3c86a8f639ca. 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/QZYFZ2313242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a20a2c1aa29ed7b9429f580bcf62ec788562d0bd0da143e87ee32845b8d37e. 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/QZYFZ2313244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004771d86e7fc2a2fb91beed72d60796f9b019d3e00528a90dc20441482d239. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZYFZ2313245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3d18b44162a54427dde0d08194c8672ec96960023074cbbf16066c7aa5373. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZYFZ2313246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86961a8c517df51f7e08cd2b1eac7fc2f756b34026ae116318be8d6669932f78. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ662339399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35115524a66ef6930614ec3f31640c9424d6f0838a6fb3e9abd736b8b295542c. 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/BCQF72300001.
Hoje É Quinta-Feira (feat. MC Negrone, DaLua, Helamã MC, Burn-O & TR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2afd447a5f4245a10592d189900df82f727d499d5223f09a53b8c54d5c40d9. 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/BXG5C2100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b25e90611f586575b923cb24adde4b07635823f7dd2a4968d263901dbc74b2b. 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/USLZJ2141510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797de88497690d204c434bbee52c691ddfd81bc5b13cb8b701a47ac0870cb361. 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/QZ5FN2120631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fae3555915e385d8e3c2185d416a60659f0c376e6988dc0f3a2f341332c969. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BC9MG2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cda4ec30ed921117d9d643cec0df54c4ef42363af2fb732df3f6c43babb61e. 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/BXKSB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cce10e59f8a8ffacc774add3e44e547296a8c01309fdb82b38182c6813451e5. 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/QZZEB2471160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351641e5a6c36beb3f78def2a1cb1d8c5c354f4422e6b3319f8c1eb5a8c39af. 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/BR9Z22400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c4f3a663b2d4066951d301c9d1426ead29cb0cdf03c52b08ae187882944202. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRC1S2300029.