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 0x112de0c1dd84bb17567ec7eaf10749c02ecfe371ffa09051421515f6e74f01c8. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96b5794f-fab3-48aa-87d0-4a3139b35fac.json and https://artists.proofprofile.net/proofs/artist/96b5794f-fab3-48aa-87d0-4a3139b35fac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Motnsalvatge. Música Per A Orquestra De CordaDe Lluís Benejam
La Simfònica De Cobla i Corda - Amb Catalunya Al Cor
Simfònic (feat. Orquestra de Cambra de l'Empordà, Joan Albert Amargós)
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 0x574c7aa4cd66260272693c69107f56c52eb1c1666d091ab3b1423764047744a5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES80A1001601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b154bc627a66e881142405a49ca6373213c68f66b5587b6375383fa38c1fe9e. 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/ES80A1001602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02d6b20ca9dcd904f1203937da43dd68488eaf25c2ff36b44f1b319504696a9. 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/ES80A1001603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4def902cae17f8795395066798cf94bb85330624475e70f732bd7a2a5e87004e. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ES80A1001604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d6cd245b3be7005b07eeb45630e399dee44344e923938c7cb9f72decf3fa4. 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/ES80A1001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbad81c081c06702573a8546d8a6ae5741815d784f5de54151e79d2d21a185d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES80A1001606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed07e9dd0257bf2173506387ff80f381a85006d788f88975ecabec4f9470cd5. 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/ES80A1001607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8838a0e08d182a982375ca3b60086331ff339f258ab5322bc14ec02eb13dd4a8. 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/ES80A1001608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80caf3217493063213d08ab78adc0143ab791f8df1bbe5bd0d4d347455d52c10. 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/ES80A1001610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212bb38271c18f497983532f0957322b50ab7da2e9e29d359d090636888430e1. 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/ES80A1001611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65a089add7d45be7fd6aca16ac2b3c1b11c7a533ac0a2bda9db99016f89a443. 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/ES80A1001612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea74d49372e6de03ee59658f0752a6543fb1b247fce2d34350777a0a5e730f4e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES80A1001613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1304ba83945f2a8f64c259c606f22c89a4721f132df912ac070816e39f404a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES80A1001614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b730e0cea800d7a8a37a5fdeeb7cf81a4b0b7f30f9dc1671a97e049b1ab9d37. 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/ES80A1001615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1799c259984a9c99ac878d5af4e7a792149a91a7422ec2c06dd48466ab1b9ed8. 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/ES80A1001616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad06008b191f122dc6ee56296b7ff900cdce2f363afa3a1539fc0ee546bdea. 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/ES80A1001617.