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 0x8a3422745b9f1cccbb32c431b10f4d2f9a9f56cc7c04036c4df6d4be79dfd71a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e36fe4b6-7dc9-4ad8-af76-88708a2d5903.json and https://artists.proofprofile.net/proofs/artist/e36fe4b6-7dc9-4ad8-af76-88708a2d5903.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
This Is The Police 2 (Original Game Soundtrack)
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 0x89d6a66e73b4a64412e9d1a0ee43577a20611880ef3edc785b296b84d02b18b0. 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/AUVKK1700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9bfeccb058421d02822401a2fce18f9a7aca7403030b18af7e2ffdd14c7094. 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/AUVKK1700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4d4b2da190e9ac6aabae1924c8fc43afe6451976f886b231861a1b1bf5f561. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUVKK1700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd2ae4f8ba9e52a03b267d2cf1d6c9afd76609ece82cd798ee4cce8597ffeff. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AUVKK1700122.
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 0x773872ea04914c3d060cb6da5be493df97e641c190b1b4cb30540bad2c47053f. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/AUVKK1700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3dd1b35c5a27801f360d21afa36c5b92ff7022b05fae10827a58f8501675ce. 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/AUVKK1700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb187e95ad58a8af90c6b6395755dcaee1b3c03d185ca1a36ff9a899d6232da53. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUVKK1700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456d406b3d07e24436b69649a83be312195facfb27649c838cc9b05003bd95d. 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/AUVKK1700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63b3e9e1dc053d60741ffcc07f57b4fd87f1970c217442dd1bfa954ab9b7d8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/AUVKK1700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d058e473f1abbbf8b0471441f13e94bd0a74976990690fba35a58d7a8417590. 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/AUVKK1700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ca4588041fa85d0ec099242144299e70b0bf6427d40d344d3c5c1f375c8f6d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUVKK1700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf157e0add6131eb762f16472eaef3a90c1424480cb42d36f2374b0a936ea1e4a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/AUVKK1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad7af91bdce2be1581679028b3acd676abef65806854636fcc51ce5babe8f5. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/AUVKK1700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679d3aa76dd69e78a2ae2717cf22ab9a58c5883a19a8cade0a2ca8d9365b11a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/AUVKK1700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021729816154fec786ebe215a2cede5085e2bce08a72b880a0feed6f155a7ed4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/AUVKK1700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372509a29f3c22e8b5be3818fb14e7bb791a29043c9bd27a7eadc1111070678e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUVKK1700142.