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 0x30a4f7a1ae60cb7d0f9281404b3b74419ebf43385295f6396e78dcb6a5f14804. 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/50a58a2a-6878-4786-9f2e-4604fbf18555.json and https://artists.proofprofile.net/proofs/artist/50a58a2a-6878-4786-9f2e-4604fbf18555.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 0x29211b6abf80e79e8991a9b335e241b57e26d0457a5e93fe7d481c4b42d3509c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ESA011301393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ef3b037ef59edf9d5e9fcb540ebd46c067f30fe53651d52a0fd8ff2d8067e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA011301399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11dc4693253d618d2e6a256d561defc2ec3f7b54f6314b392ffdb72e9ef94e4. 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/ES17D1700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ecab7ffb6eb61781c83522d8be40c655a77e28ff646a7181e60d560430032. 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/ES17D1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04223e8712b6afc49f11390e3d2b8c4026602078a26a2f1ffc42b6661b8c6b8. 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/ES17D1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b41f0e1e99ceb4ed2714e331639d97931365675c709863d745b5d84acac16f7. 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/ES17D1700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d85d33ff9eff075b11d52e2fee6f8fe33ca0ba3184c3fabab47a42cec430810. 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/ES17D1700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb316b558de5853b52e0661f23188e2e9417a84ecc557af774c68e5684d66f46. 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/ES17D1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ec2f1286559cb973028f4b636beb9c1cac19118f0e2150d6999f852c8b4d5a. 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/ES17D1700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd904d4b446a61858081239c5b9c84ce343ca3fccf6320fd1975ecc95b98f6a8. 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/ES17D1700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d59c47baf8dc1e05338576614292d3958dd34bf310c23f411c774a79753978b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES17D1700065.
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 0x3ed7bdfc64856fd9fa0e6d5665882cda44dec2b5d479fce4cca43500b706ad5a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES17D1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255e02336490c47439532ed9249068b140a9496d163ae0b8c691617aef7ac0e3. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ES17D1700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7ac57d5838ac0cfa478b7782e4430817be539aabb76cb75f60918c661bd78. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES17D1700077.
Tots Sumem (Si tu ajudes) [Sense Límits, el Vi Solidari Per el Jeroni de Moragas de Mora d’Ebre]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7818406cae25d6f9df1f8aca9dab5c5ae4955b927bbd4c676b2c47db23228. 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/ES17D1800457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585af7cd55f68657fb27dd5f8b87bba1b9412d0c6ffe3cff581df0a6fcc6bdc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES17D1800461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e47eff4aeed6e16b52059f3dc7b66ee1dd9ebca7f416dbe4708ee9e289da066. 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/ES17D1800463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8106c868f64e3d9333c83b74cb6597f84d1f1f8d0a36362389faf63df77f26. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES17D1800462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e9c0260d8abd6125da1187ff65f6009fbd32a248d8a4e3501f112b4e30b5b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ES17D1800464.