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 0x2e9b0fc29b39c4835ff9611df168c6ae6f145e7be63dcad5e48ccb17b09cbdcc. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/064df26b-0032-4cc6-99cf-a4d3d55288b7.json and https://artists.proofprofile.net/proofs/artist/064df26b-0032-4cc6-99cf-a4d3d55288b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ht- Guitar Trữ Tình, Vol. 2 (Instrumental)
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 0xdfa68d70a4c1124287b6c7c17b9855095440b24ee1d6c1401904a251752276c1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/VNA0M1839770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bd604f5cb349ae063ed46d8e676bffa280f63510d6eec7d22e966b022b46f. 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/VNA0M1839772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e20dd5151e0005a7ebbe53e24e3b5af7502467d222ae5d8706eecca56232b2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:49:54Z), 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/VNA0M1839774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c92b87282a365c7b15885570cf2336d69953b49927ed03b1fa091732191f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/VNA0M1839775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b2102af38861247f0cb9c7235dc1dcc70b7a4a3691e72b83d46b335a99cec1. 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/VNA0M1839453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e13e000c0ac9f89e0c5b8088f188269defe6e766140771e30642254f16465b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:12Z), 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/VNA0M1839759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe988acc1f4e07f0e96df122919188f4c6b16a5d79e9c13fcce6d05f50266fa0c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/VNA0M1839761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd19d09ce932f8a348e746370c64b63fc0d474d25775e5485bab4fb03b3b2c1c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/VNA0M1839763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d22a3183446f70986ee96380cf0ffb19c59880854304af0708b060b15757e2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/VNA0M1839766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074989a3c07768210c4e3265caf4f63cbc1b95ad2c33de7fb8797328803b6734. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:03Z), 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/VNA0M1839767.