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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bbf481500ff47be0ead04f2d19281a79ee70dfba746b204d90eb889f72cdbd. 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/9d7b7912-5f5b-4c83-a510-37fbc852030f.json and https://artists.proofprofile.net/proofs/artist/9d7b7912-5f5b-4c83-a510-37fbc852030f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee709671e9540819ff612c1623c4d634b97475f800fb36c68127bdd6fb75350. 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/CAQ521683501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d59235a3d3f34688014b871202df2f713b80f20663c2c39cdc5232f4d063cda. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CAQ521683503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ea7bc2ce20643868633e5c04db043b683fea99007e968284ddc8cba8f0ca2. 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/CAQ521366301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15c3cdd1475ef107dd40d64b20ccb91c5c15a041f348de2bd90080f238de72. 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/CAQ521366302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ec7cd00feb23e1f2273e7b04b7a95330518a99056572a4435773ab8478067. 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/CAQ521366303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc23ab1667e6e49d7eea4e22edc23210808ac5eef74c53a550e4e9d462ef481. 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/CAQ521366305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3657437c1442ae5428622455830b5e5251656d62012570d5faabf6ac00883505. 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/CAQ521366306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba4a5c170b66bd10ec585f116a100f6b16dee4397bcd0840ac14a9607dd604c. 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/CAQ521366308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea4eaf9dec305b5a52936c6789850ca6f056bef63cbaef205c3ddc9666f0570. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAQ521366310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2df91fbe4bd105bd882ad2ecbd75da5abe8ca53ad4874e428a75e791928deb8. 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/CAQ521366312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61895cab7bc5ce298739fadc161079ce036866c500c67322f7643342b7dd659a. 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/CAQ521132203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4e1d2d937a02f3dfe702ee65ac609c727de4b8eb2ea9cc91b91117643e9123. 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/CAQ521132207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3581547b7a565b929c88db7063cc81ff4093ea273d367e0e85e34d1c7ed441d. 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/CAQ521132212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddce8ec6599812214c53c131c79726ba4ed4a40a13572082e68d037114fea2c. 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/CAQ520905001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a5334273372fc050d15b91e9a0e386c52f3d7df49842babdfceb6d9380187. 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/CAQ520905002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a2852f9c291dabe1c0ce195270ba57af7beaff02769891575bc11a1f1916e2. 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/CAQ520905006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe3256edb96fe511b0ba559ba0e3747ab1059d9fffc1cd28696ac97812e41e1. 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/CAQ520905010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338b61f2a46045d049c346bdcda56acb39a1cc0f084ace17f2ecaf9f6a05485. 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/CAQ521096011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22003cb475bc1c19f646632795bab87400feb18f2377d7aa5c1eef5ce6df88. 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/CAQ521096003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665de7bcd4b15b5c8d4f72ccafba5c6ce192859f147490f001da9146159020f. 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/CAQ521096015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1ad803f814fe145ee72c0b4b3b05dfa13698576a25217f5f7ffceca08adfb0. 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/CAQ521096019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59a3e68187d94fd1e38496ff117939b2dd2f3122ed21a4cf30044ed2f80de7. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CAQ521807102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5df385ff82a60a493633b1979004f4f93818c8357c6ea5d1f04650cad9a060. 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/CAQ521807108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ac74d127424638ec903c39e8f27fa72cda0d1fb29edd4272bb60361d8bfae6. 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/CAC221200009.
Noël des enfants / Happy Xmas (War Is Over)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6dd1b804af7dee5e0e61b3f37659a3e2c8641cdd04919a31eff5a8de01fe26. 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/CAQ521938001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe4c1861daa7232ce8d73d392b9ffc1cc84ef5b2151c1b2d5d94eb48a62f96a. 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/CAIDY2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c45b528b35d3bf46f1129bdb55ff5ff3252b337b0ca6a42b8f6e74f9206e80. 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/CAN561700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f488c6212ebf99c95ead56a26275371458c44495808bd652977465626697a4e. 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/CAN561700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a43c407fbd02ee1cdf520175f7b0c057770c1b7fdec866380d01aa2d9b377. 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/CAN561700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f698b2091b3af162c47eba43ba5ec3ab700b172e8fc91301f561a0f719a12d. 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/CAN561700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33911681fdd47b65a047384bdc11008e805ed607d96678b630fdbb98aac54b70. 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/CAN561700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d67bbcee11159a683c1dcabd33779a606586a6b226a759b29ccbfd469279aff. 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/CAN561700012.