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 0xc94ea9499231e9dacdaf4f5e590a1c6a7c2933587a4e04737d93c5042e28bf4c. 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/1c58be0e-65de-4629-9c65-7327c6fe538a.json and https://artists.proofprofile.net/proofs/artist/1c58be0e-65de-4629-9c65-7327c6fe538a.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 0x707f2b8cb8ff38bcefb4f57726cb9b871d6719a3a0f0e5545092de4bae582db2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGCD1801537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324eba4cb0f8b2798f94aec687ee7192a08e9291bad1f45ef7334ae765c9059. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGCD1801538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcffd49e43129fb1f7b99b940558b14727d21fd39d7c6078379522f890e1854. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZGCD1801539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2e7cd96d0258ba1bd67a3ad333011a629ec120194b2969dd867fa1f9aacae. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:36:17Z), 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/QZGCD1801540.
Angel Dance 1 - Khiêu Vũ Tango - Rumba - Cha Cha Cha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65342ae537ccb64a5250b0c364512a072b987c0fd58ff654d012f94dac8551cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGCD1802776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60798be6c8800b4e2ae7deac8dd7e61960ea88645d385f94bbcab6d0f3dc3c7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:37:54Z), 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/QZGCD1802777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6207fea7afe57fa0c6d35a45edf2c4d891808f1745c536ef119aa4370a15e2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGCD1802778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79911a8a592b29b5578596d1e0104553480ac9e900724a6b3091c97137c931a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGCD1802779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc29cadd217fde8b6cd7cdc37b0196365bae7593da8929651a5fd30488c6c1c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:41Z), 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/QZGCD1801094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b29e2fe1e798bbdce4b36a4c911c0e9ebd7dcb66c395512c04c79236889f9db. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGCD1805573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b08a06c101ae6eacb527bbd5fc332cf5c1b625a2593ab8794d1e515007609. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGCD1805574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26448a7476999729fd0a1d74b81d83f4b2c9a96e916012f5e20dd4be2e59aec2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:40Z), 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/QZGCD1805575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97249691f463ab885452f007014e470d36e28123bc0aad24d43db1a5193261d1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGCD1805579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313cffb9621d1bc50ef4df47a83ecbee7afab1b3eda16cd627a6968140a5ad5f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGCD1805581.
Hòa Tấu Đàn Tranh 2 (Dòng Nhạc Trần Thiện Thanh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78aebde4a15833e8109570376a6ffac7c55dffcfad1b84b144bbc5e01d7bf5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGCD1804825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef34f2a4984d6e138f96b5f57258c74087b11574939c4af6b708efeea241bdcf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZGCD1804826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f1414b302337de064c6e5f8c466153843f9d3d4ab3105c9f7f6540d2e966c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGCD1804827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c50b63df2b1a739fad87b034bf8e79034d7b6b53d8d33408c1948bea3d43d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGCD1804829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08da7e9037e71878c9c0c396b149da4d87cda9042015e12b9d801cd51916c9c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGCD1804830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96aa14720066bceda0565d6289a44c1f40d81583391f92528b7f22dcee8bdbe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGCD1804832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403f50ec41ad7a2f8fd84d599adc9513e56afdaafdf2d3a96a3e56ad7bd2fecc. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/VNA0F1725172.
Còn Thương Rau Đắng Mọc Sau Hè - Instrumetal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc6354e2d760c52ebf4758104dbc1d399079ec9d3f87c9f038b9641c95596e3. 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/VNA0F1725173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc5973bc770b2f8b551bc9bb5bf5b5741d6660e5a352112f9ad022d98b7429. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA0F1725174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d33613a26e9d4df746cf10098eeeb760659c85a763ac82f19813311aba9e42. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA0F1725179.
Bình Minh Trên Rẻo Cao (Tiếng Đàn Tranh Của NSUT Phương Bảo)