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 0x8fa96a2da096708a1f671cd383eb7523dbd45c580da47eaef3ca90c196c4b5b1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f83e3b9-2fc7-4ad0-acf3-895562c435ca.json and https://artists.proofprofile.net/proofs/artist/7f83e3b9-2fc7-4ad0-acf3-895562c435ca.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 0x30d6e0b12dae16e837df70cf2603a6499eaee6c5603ae6451075a5ed1800220f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMKSC1901323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ede2225c4779fc4c2a6bb6a63670798747edb75cd6a8cd2c5ff0ce9307a2a. 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/QMKSC1901291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c3f15e773558b2564f5e2b3540e830d3e77535598061efe1df6e5ab8d4ed6a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMKSC1901324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984baa7b33a2bc5abfa83d38c92d8c4666e64a804e5172ba33b8b2ce234eba92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMKSC1901268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f8a415bbcff4fb868a663e817bf0f5d7be134a7278a308dd3c533b7738b06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMKSC1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580ef07d9885cee59e063449c56044df29aca6396600550f1cd3554272ad373a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMKSC1901326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc14fe02ca5aff0a8d3a4b33b194f2cacd37b58c8e85548562ab1fcd2eb8f571. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMKSC1901319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fafa7fd8ed152cd333513705eb98ade7341c223f2fd9e50e8650dbdc3f98a99. 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/QMKSC1901327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e1dd2bc58bf462bbd31c30eef7ae5475ef833fd56fd5f5fa02801aa4f0675. 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/QMKSC1901328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0fd43beadb2e70a21981600f73f5f3ed7e6a9e728e237c7eb6a797b4b7132c. 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/QMKSC1901329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1d87204efa2479ce594489733df76c9e1b58b50938aaf47bc57f27e2e1f299. 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/QMKSC1901330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984baa7b33a2bc5abfa83d38c92d8c4666e64a804e5172ba33b8b2ce234eba92. 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/QMKSC1901268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ede2225c4779fc4c2a6bb6a63670798747edb75cd6a8cd2c5ff0ce9307a2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMKSC1901291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1cb8d810050732699e0908e33343559d68d31408d8198bd1de33f96ed5cf19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMKSC1901094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f8a415bbcff4fb868a663e817bf0f5d7be134a7278a308dd3c533b7738b06. 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/QMKSC1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40df38840d226a4eb6a64a7c5820db49fe9899378ff4b08d4a0c7fedcee4b3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZJG52014828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f91cb65456cc82868c0fe406bd9157a7cc53d16d61919ace68352ecd6787c82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52014842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921bea32440721bef27f9e893b703074bfd8aa0591bff31c22f2b1451b03c80. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJG52016998.