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 0xb52a301c2cfda13c57b957aa3d8f0f4bae0a19141a56eba1dc32a686f6cd5cd7. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f167bf5-2020-46aa-8995-9cd53bb27091.json and https://artists.proofprofile.net/proofs/artist/0f167bf5-2020-46aa-8995-9cd53bb27091.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 0x1b580f34ad9af5baf224f9e482123654e4ba4a859e6e6f068cfc5eb96c744a51. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRX4Z2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07afc7143688de45dc6f01eea9a612f2d00aea006ecd0417824e1e420331ce7c. 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/BXPGL2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d11ea1970b057d400b84bd5d089cb82d865378e0808c70590893bd5139fc288. 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/BRX4Z2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfecc40fa69babab2cfda9531c6c9bf18915789db26904c8e3ae83c690004ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRX4Z2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389642abf8bec013a004b1d90f73e72c8d255e180796ed948848f761721a71b9. 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/BRX4Z2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d06150d6251029e3441ee4cc959d80aff05bfd41a89eb85c5d54e17ec5b9e3. 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/BRX4Z2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8974aaf440467c97f737b853d1dfcb32e8ed6c663893634c3aa591f4a86058e2. 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/BRX4Z2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9994101111ca9d6893b2ec9027dd4771628424bd36e83a0d6908ea742e5a019. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRX4Z2200005.
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 0x98d0a7baf6d9d1c766998eeadd428e5dad437c45136e0227f804b96b1592ca8f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRX4Z2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5ca8af069db5198ff719a7c874fdb5144a7fd78350db4640dd8d3fcd817106. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRX4Z2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe915abddeb7f9bfeba6324a61d6c3961a9ce47979d20ef679eba560c7014ee2f. 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/BRTRB2069493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece50130bf9612b78820f620342b8d5aa968db44678286c72efb88601d32076. 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/BRTRB2069494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3179e525a15e803ceafec98292c2ac1348d5b6808bdd1261bc119fa81130d5d. 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/BRTRB2069496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a178d2c53063dd9e77e71987cfd415dd188eaa251f274f1c2fba650116657a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRTRB2069495.
Das Verdades Que Eu Sabia - Tributo a Guilherme Arantes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c507e833ab8b5cc468d252c605e3d9322dd506a37b502f18b8ef773a04f29. 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/BROWU1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0be9ae89d210e14f19af6d586128bb80227f6dec45cb0f17ee556bbb27975d. 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/BROWU1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffcc305cc9b4d387a77fea064844255d7d39e924dce0136f78e175928a4864. 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/BKPP82400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e48f37ddcf43cbc2bc8129bb7d3d5945311863435b9625f05a8f479532ee1f. 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/BKPP82300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542d670d2290f92fd1b0b6267f80cbb53269544e0e2636d70f4fca03b534311. 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/BXPGL2100001.