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 0x946f778b63c3359f8a8eb197cbd702294daf2e96a268eeb32217c210f1849194. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ee6c67-3a21-41d9-b6ff-2cdfda930544.json and https://artists.proofprofile.net/proofs/artist/74ee6c67-3a21-41d9-b6ff-2cdfda930544.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 0xbbe99e3f74de8019ac600cfe9370d635bd6b09723f30347f09ad23116fe300fd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:15:34Z), 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/TR0331208758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9d0a6178c4b243c1d96a2af38cf0dc229c95f3c7085d6e1fd34de1bf0456d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0331208759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd183e8fdb92520c97bfab433b559fd3508f1e4ac98768f80beaee09b7a3706fa. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:22Z), 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/TR0331208767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b1d6759d93b0068455e4e824928ae218bc9e7db5993a5bb35fc12fc1561be5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0331208769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf890ac5c9d701230f9f2dab0f2d4eb67d1942eb963a9b24b2883cc02114e8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TR0332212929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd838e3e5d99759e89e2746e74812d2d866849354785ffda21a41737fcedfd81e. 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/TR0332212925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f7fae37c9c3f6ef163349b5f33cc2f1cc5aed25e0f944ca2c7f7e352b6951. 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/TR0332212928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb901037c0858e483659a5c27cb8efcf7bb844826a69c2504cb74c1faf55f4eda. 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/TR0332212932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27577a1bb4ce43127a770c618badcb4159f7f8b9ce6f7a249dc8633404e14f36. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:42:23Z), 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/TR0332212923.
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 0x2e5501a95de98b63ea119d1ccd3029a83d94a728354c5bd456c2f80dae3cd21d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TR0332212921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcd6a2530d979feb1685e6e0fa6b6718b442295e42f7054d20393ac8f15662a. 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/TR0332212927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d907e8ec8c491832144e8792c9c6c6fa7555626c1bcebdb5bd665d7c91d76. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TR0332212926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044ad3fbc90e969cbaccc3011445fa7eef284909414dddd8f56503c748d2c60. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TR0332212931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8696d4cec1757d0df47e81497fd88aa231cdbc92fbe9525a64c431a986f0345. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TR0332212922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461d3fb23eb9eeec7c43d4c7003a00f2697625437926c7aab8e3b0e3167f822d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TR0331208763.
Türk Müziğinde Unutulmayan Pırlanta Şarkılar, Vol. 3 - Rast Makamı
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc03d158809aea3125142964cde67714c52e556a8991fe54459402d5e11183. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TR0040500264.