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 0x853e3cc9203d3a51d8e2bbbd115f019920fed318355d9c43414f6913ec812a88. 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/d2dc0d62-af7d-48ae-ae29-0c082e5ff9db.json and https://artists.proofprofile.net/proofs/artist/d2dc0d62-af7d-48ae-ae29-0c082e5ff9db.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 0x62445ff3286593f7bfcac2ecd2908dcfa3414331edfc033bb0eac0408f655a58. 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/PLC062429682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f6240a14be387f9f355962744c43a730a0e9e3d5fcbdf5a4edccd96f73c55b. 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/PL96P2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7bd510e567be5d3d807e6cecefaad52e8e095512292a8dfec641266abc6923. 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/PLC062410292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b0edcb0367123b54ba23bb9915530cd8d8c8afa001a2963c994f65b4459b41. 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/PLM402309008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af926c42b5701cce71c3dfd7f9716d8fd5fbc75f8efa838e84b0bdc137ea42c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PLM402309007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7396682804caa7cde971bcb3df806bda3d4c97d54bf9ed9819a42df0fdce3a2. 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/PLC062386395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfc6ad1c971347d2460e3128cbeadd839879d08d3f63bd7b720ddf9d6f40132. 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/PLM402309006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a134e3eb3cef138ba65a8c7ee78f1625d201a46558090db2269a5491087e0d6. 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/PLM402309005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d738ac2bc6cbf8d468a531f6dd24d9706b0feeb3ab238de9abc49dc7846d22e. 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/PLM402309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5522b9e56e9ae2a504ca77db1ed3f79c38acfc9d3ea314fe70539f55a5e60b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:07:01Z), 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/PLM402309002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b8b882602a8e786de8992ab362920f2e8014ef73b1674304e5a81851fdc988. 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/PLUM72200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c4e8c148fe00b9357eb015feec2f6b40a4a40a462748c1c7aa481d7e64c29. 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/PLC062223729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f94cf1cc284271d15c4afd71ce52a7e880e9872f488f79a6955406ff630a3e. 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/PLC062221927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc870292f4abe5d566fb85784073a104a252501905339be608c281606f96c3c. 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/PLC062121087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9ee6141b41148806de8c07d74e2c54f8acdfba5525d7836a2db5e4e245fe64. 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/PL2DY2302400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a52eecee1e37f455dddbf7c9ccc6d80dec61c0de281a2977dd830eebae8c87e. 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/PLC062229575.