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 0x01f8232a48a88e351e8f8625d5a69ed09d379bacbccf56c91aa3398281f4aa0e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc4869d6-a372-4881-9841-64357dc7c975.json and https://artists.proofprofile.net/proofs/artist/bc4869d6-a372-4881-9841-64357dc7c975.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 0xef5539237cca9a8cfe41405ab74f947e3ea5a97a4ac0820781c727c36a4a9515. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA450172007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0880c5933307e5cfb1efb9dded592875e78bf16f8a9df9b5a9fffd9240e2ce. 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/TWB879803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e3e4269a20208dc19193dda20d3918f0cf9146305e48d73b0bbdb6ccf19636. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA459336501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fdfb308b9ed9e6358ebbd6c23f695fe14ae6fc77a54b09bbb2d22c078c14cd. 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/TWA450893001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a4ea73e417d386ef81e7a67b5f12aa6ecd0dc2cd1b1b7a7b489f9eaa33ec6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWB879907004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f81dbdb6bb7d1c1b605ef4b8c81a411d3f6c33efe5a3ae3dd66109a3aaf957. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWB879803001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f49705f7cb0a64255edd2ba712911fb07c46ee004844606f7aa0bd893f43257. 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/TWB879803002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1f8c9706cbf606d62b3d3f41929cceab7babf47b9b9418fb3661a288926a66. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWB879803003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c69a9b41df26938a7e557cf0d1fc172143c0d7a78b5a2cd3e82a3a10928229. 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/TWB879803004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e81f6dd5021190676354a4c13d2a758e398c54d3e82b2ba287eef0414ac4a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWB879803007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0880c5933307e5cfb1efb9dded592875e78bf16f8a9df9b5a9fffd9240e2ce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWB879803010.
Elders Drinking Song 老人飲酒歌 - Original Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d80920d27f96907bbab8bdc04bee2dcc7da9d8895b0b6a2c46034ca0b03bae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWB879803011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e6f207769a37aca005e8bbbb849774a76d6b54606fe4a88a46d11ab8660d7. 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/TWB870008401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a40fe19b146bb22c4b8210c2ab30d9dce8b273d1c451bf515477895edaedb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWC939900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d06b4467eed5f2e14a67be929f053273822252049167da8e78556c5fd675a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWB870008410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937fb86d701ad729584370001f72d30ec9ed443cb0f46eb877d96a15378c4cc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA459546201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10aceed366ceffb8bd37a7b8607af86e3cd5f0dfa4f57ddae6b958e21d5b2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWB879815023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4412cd2b98af8e8a8fdf54215d7f05d30353e88bca9e118cdc6f412141b137. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWQ752100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c924348672f3be88733f62d52633b94db21911215cd61cdd3497ab1ff78ab1. 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/TWQ752100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f9f49584c4dc038b90a2b43db894c7331c85e96641420a3b611cb030468f8b. 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/TWQ752100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91369376f0fbe5fc29767cc4b10bd5a5f1e6d4c98ad76fe920f5878b397799e. 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/TWQ752100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89faf4ae0b6c5f2fff8ed32aea8b62daf22703c434fb7873952603910e141eb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWQ752100009.