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 0xb71567224d63d3f16b0f0b1a146015bce35852c9c5eecf587fd3c97314ea0e2e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0214d173-e5d8-41ac-afba-847956c559d8.json and https://artists.proofprofile.net/proofs/artist/0214d173-e5d8-41ac-afba-847956c559d8.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 0x94f4e6d756ccd33216631f3e9b3a2cae550265254ee4e84fd14ce878e6d77728. 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/NOHVY2308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3361f47bca445381bfdd72ccc1cb952e24870faad0396b2f8a6ad82607a584cf. 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/NOHVY2308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a384bf36c2f42f262b6bd6df6763b567f78a1dcb6dc2bde2cc5687c4eccb1c. 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/NOHVY2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58872e9fba807b0597b9da102a3e9fe4f85e7cb6c7a093ddff96687373b72c3. 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/NOHVY2308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dc44c981a1f39c6e0dface809c23080e8917baf4a552d74a8c56dd5f0074c9. 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/NOHVY2308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf35eb2a72254228fafa496afb5ef546ac2f605c42ceb15cc0e0eef858d5b29a. 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/NOHVY2308006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2787573c072cbcf4d58a5e31273b0001d5f957c087cd5951c661623ddccc84fc. 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/NOHVY2308007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b972a03818872a07c0a2fcd6f1c0afeca13378e05e91f7f5453b329e113f84b. 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/NOHVY2308009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9323e6d44c3f742f6afeab3a78fd9e0b3b7163b6914f933afc84dc2ccd5792b. 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/NOHVY2308010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cdaba45d4c4c0faf078d6ae8ac9fdcc08dc01ff73b4092ee015bfdbca8163b. 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/NOHVY2308011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080f6b6cfbfeeea0f97bea6028bada125ecf09359438695bd49aea7f7d5a06b3. 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/NOHVY2308013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3361f47bca445381bfdd72ccc1cb952e24870faad0396b2f8a6ad82607a584cf. 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/NOHVY2308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a384bf36c2f42f262b6bd6df6763b567f78a1dcb6dc2bde2cc5687c4eccb1c. 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/NOHVY2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58872e9fba807b0597b9da102a3e9fe4f85e7cb6c7a093ddff96687373b72c3. 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/NOHVY2308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e60e88e700bfc27f46cbd437c0fb6e033585bc545ce74b6bcd2283ef8ee714a. 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/NOHVY2403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e289ac39069c06416294ca2db1ea83a6b2da3e297e8147e01599af79649157. 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/NOHVY2403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe11681349a3ec71983caac5eca270b7346dc57a1cd7867e97ca90668b2f8fd0. 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/NOHVY2403006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9402db4540e7faffac007c800d81eb3d56704a55d63b7dc56b0e210281f1e3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOHVY2403009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe11681349a3ec71983caac5eca270b7346dc57a1cd7867e97ca90668b2f8fd0. 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/NOHVY2403006.