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 0x2e0280d98c577f002494f7415973efca685c81a48363b552325b57694f01cfc6. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45020f7-2064-40d7-aa59-2f3da48dc63d.json and https://artists.proofprofile.net/proofs/artist/d45020f7-2064-40d7-aa59-2f3da48dc63d.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 0x1dc5cc625b911e113c7058c99964a73020069cdaa80a328469908568b91ea7e8. 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/DEKV21802274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a709bf6c8c20a492be2510131e0862828a4a09c0e9c14bd361b78dddf6778b. 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/QZTV32449785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816126f6bc2ed4fbd8fc4a2ecf42dd78743e3d708647f7cba78a468063c750f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDD2481096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816126f6bc2ed4fbd8fc4a2ecf42dd78743e3d708647f7cba78a468063c750f. 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/QZWDD2481096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaea525a9321c4d4930932fcb5bcf32d0f6ce5d836d01e0468f71beb56ab8b7. 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/QZMEM2220472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0247ac883779e0d4ecf696f39f7841cba1648106c8b5ae8b42a6d3c0b53bd60. 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/TCAGE2236596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05737f9d13c481c0cb98dfb097aed1e1cd672370be32868d89f993a45a99a25e. 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/QZ5FN2224591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2401c3603e5379d1cd8872bacc1ddba20d4bd74891f1687772b81c2d85458619. 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/TCAGC2202960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ab73124da739db6dfd2b3db46056ad045375098d0e93a26c1a8e93881beeca. 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/USY252035405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d73fc815522c39baa56d98dc97ebedae7255ee6af50794a0b416915275d652. 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/USY252035406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c659816419e3815318b1feb4883e25427527518dbd8b8b2455f340409efea3b. 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/USY252035407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3464fbfc802748c3a54cb707ed17ecd5f742cb69e0229f9c20eb2f762516cd. 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/USLZJ2221858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a4aaf9aa16b7ff64011dac00b082c2715500bcb2a8ae163b60f74df89145f. 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/QZRP52152848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f555102f6ba1c87e5dffa50701b64db637afac87f8e1b0d9cde61bd6009b30. 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/QZK6G2130042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62762875cfc883c01fa0c51910e84ac18d6913ba0c53345ec6636c5a1ae8f2c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2138181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffb2a60a9961d73585132751aab1609c85740ad75c663915c12f7d3ccc110c. 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/QZMEN2138183.