thumb|Trúc Lâm Temple, Thiền temple outside the resort town of Đà Lạt, Vietnam. Thiền Buddhism (, , ) is the name for the Vietnamese school of Zen Buddhism. Thiền is the Sino-Vietnamese pronunciation
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 0x34859684f7bac93331de4cd02b48911837238e7a5414aba0567fabc35d70ced9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fa6d94a-0a37-43df-824a-dfc82900a495.json and https://artists.proofprofile.net/proofs/artist/7fa6d94a-0a37-43df-824a-dfc82900a495.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 0xa6809b3881a19fdb5c7792cc6d88ea19f88fa61932eadfc8029b7eace8e4496a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6P2586450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba599e7e8964a01be979d78d2965a3b3131f63edd5552871b8a8772827ab860. 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/QZK6P2586451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578736e13c853a9dc2d67f6b29d6f5a5e0433ccc6e49e1ad5ffe5825a15941b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2586454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63917d669eff3c200edad8192a866261d1d1cda1405b201201fd661f2c6fbd07. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6P2586455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b531c8a61017e98341d04f5b63edfe69c23a5cc9819caea23cf8675418e999. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6M2530666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16cc04f76094065d48e73621edf5359c44a614a8197b1218686775d64827523. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2530669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c727cf25d88a5e88179b9d31950f851dc7ae59eadaa9421a0385336b9a3dd73. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2530672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad832388889ad398f13b90c05835e86cffa0e217b168f9c76c08fbb8c3d2cf7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6M2530673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472a8f1a2b999dd0334a297a4883f041e4a7b630bf2c9e762a87db91cb4b3429. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2530675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4026d65f184a6572806a2d29898a06b453daaff069262d04cb9ba5b793159d40. 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/QZK6M2556157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f33a4f865571efdf41d3ee75f52880eac6cd4d952b892dffa4b8f1187bc21. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6L2551854.