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 0x80fb07c5973d9475275c0bdc476f95903686422ed05b26de66296a6171c1e06a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ef9079-0c87-4a9d-9920-9a7b6738a8f5.json and https://artists.proofprofile.net/proofs/artist/d1ef9079-0c87-4a9d-9920-9a7b6738a8f5.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 0x001d4dbd8ca7fe329d6e28b9a5eee49106f1734dad0daf6879bdf0a44ade7b07. 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/UYH262000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617dfac9727e156faf2b91627df3d21e5b5186307c6d2d8cb067fb853820a7a6. 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/UYH262000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d24189dc42962575f5a41e377910780f75aaa2de14485ca671e215a4c5f1ed. 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/UYH262000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc439712d82f6fa939a85562b7c0e59431a06def336e0f054cf8e1329bf8db. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/UYH262000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96c3aff7248c960eebcd8c50bee977fa8e8023d37b1395d405b803a15a265fd. 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/UYH262000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b6dc07ec0be45f25ca5b08397273f7786d03b0ed656d9096793dd611751b27. 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/UYH262000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa189161d0b91f8057cbbd118b174abe17805afb6a178f487289b7e59d9c3e4c. 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/ARC571702093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fe3e95a58b939e0162dbbe7e7c513fb1314663a03176b142584909f908cffa. 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/ARC571702094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056e54cf9df3b357a0974a6cc8b8986ec08f5cde62e45aa44918e96d1b3c5763. 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/ARC571702095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5776ee6de1665ed0d17034675d2f4de1d0e6b460cd9ed4af80ed9ebce8505e. 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/ARC571702096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662ae985001d855e981c5efe05de290c8e6aaec8edebe20c8fd67d36ab1c2756. 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/ARC571702097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0abf674caee55922cb79d1e8f46c3c094a3dfac19e94efd810d1561712496b5. 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/ARC571702098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed7c26529abf4b7c72c90e91b6f8bc26ba698bbe9cb7c044e078a5aa0018f65. 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/ARC571702099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b75a125045b613360453c3036cbd4ea2114b2cdbbcf8e253d86ba19b6832f. 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/ARC571702100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4da18c30fe0eaf2329aecb142a2c2c8c1bfc6a62fd2306e47cd5d802f7e742. 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/ARC571702102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526b4edccdac749c109d6c47d7ff3ba5df19325ccdc951658cc7dfe2dd408c85. 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/ARC571702103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1005ea5976a0847f593b4cda208b8bfef37b67570727ba3179709db866ce6dc6. 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/ARC571702105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cf8cea2896f767a996a29471557587c97a811ba3a65a8164f31d2609c85aa2. 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/CH6542076083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d8f62c600485b4c1906f321051b4be2e79381546c63bab0bb0cb9a61cae91. 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/CH6542076085.