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 0x3088611ba01b001294185fcb658bd51549c67a22a1070cfffff773c313ebac7a. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef736f8-8534-448c-ad63-ce98f60987a3.json and https://artists.proofprofile.net/proofs/artist/aef736f8-8534-448c-ad63-ce98f60987a3.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 0x2445d59ba92a2b62edce826fc5f1cec3f6eece21c6e7ed2c711122a3260498b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQP11501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903929f6febca5afc507549cb9a358041c6625f84f9b6ebb936aa2a02ac4e77c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:40:58Z), 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/DEQP11501004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f7fe2ca1b6a3bdd8a3665ff4fc094597c8737e949be8b74ea2bf5b82b7befe. 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/DEQP11801403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35055b40bc58f0698baa861b4555ded83244ffb279d56f14397092a60871c01. 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/DEQP11801405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211ac96029e8b66044595cc793573b08b02e3906fdb3f0083255ea8f2cee577. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQP11801407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32996ac0b1c66aeed03a9e867a5a03fa0ae6c4414343d49e295a37377847d5. 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/DEQP11801411.
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 0xd259fd056985dcc3ef12ee71e381ff19b245bedf38aa2b89102f5480543b10dd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEQP11801412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f7ca385ebcb6b3a4b9bec2b2eeac794cfc1a6b5f8b4b1102077582924a2323. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEQP11801402.
Antonio Vivaldi: Flautino Concert in C-Dur, RV 443 (Arr. G-Dur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a97f34e8ac555363830aafb8f3c1f5baf6f07a14387fc3b9fe6f4c27b617e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:26Z), 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/DEQP12301803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d189116218d34e7c157135a5b40a78fe8509f2fa3a398455390a1e9f33199. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:30Z), 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/DEQP12301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5193eb82fbc86f22cf36f528356d2a2aa4aab2b316cb021e464083a64b618999. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:35Z), 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/DEQP12502001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9012d4caea554fdbb5034bb92e96f1ca18aa1aad9dbdbd3d601c125ef6d6a5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/DEQP12502002.