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 0x1c1bd0a9253823e70cc9b2e38ad833fd5cd6bfde9b284f96afd022ef147be363. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3766c95d-319f-4fd0-aa12-885db20e14c5.json and https://artists.proofprofile.net/proofs/artist/3766c95d-319f-4fd0-aa12-885db20e14c5.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 0x77ef0325d9720eeba6c89e9481a37aedfd27400491310a3e8e4eeaf6b4710f64. 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/DEPI82102420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a27320571e6780abd27560981eb81fd82c4d94c7459a78d5932156fefefda6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:06:40Z), 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/DEPI82102421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfa77c2c41fabe2b403f878b3bb036e1215bd644abcd9e1d92f33acd60ce15b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEPI82102422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f5769e8a1c66a71251a939b01bca4a4d681f1fef53cc42098b5288494d2a3. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEPI82102423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd034fe150b26492d027292795288f1ff5afdbed4d4a7c987adc6343092094e06. 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/DEPI82102424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e69cdd345fef6ed4a4b4ea1c7b42873b385faf2db468a615ccbbed6e4d28c19. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:39Z), 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/DEPI81704846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca71e88a64a34c78d235522d8b1377fdb04f998ac7991135941535f91c755ec. 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/DEPI81704847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a49a231864f28fa5b144cc9b27051dc5166494afe6ceefa5f38c208e0a49f7. 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/USCGJ1488982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf6d8cedf6c9dcba51f16854a753100b1755066ae42c554c65b242916735609. 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/USCGJ1488985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec70991c111ddb5e1b675e58149c40dd1589bfd0d32ba8dec54f950b2779e4. 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/USCGJ1488989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224cc4ab7d32cf5e754c58e28765e17525a9ebc0e0f5c2549574a0d83404d80. 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/USCGJ1488990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af46b316feaebfa8d3bf9b8206733e46f7895bf7a8f4a1d0d72ef9c9bc099ca. 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/DEPI82431497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a27320571e6780abd27560981eb81fd82c4d94c7459a78d5932156fefefda6. 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/DEPI82102421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea554bf3de16f53082471124b8745f9226bcb1fa97d804c933de2dc7cbc465. 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/USCGH1307062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179741fe28a6214b92f5e706280db01c9ecfc920cd471725eded5ed7c827e46. 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/USCGH1307065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470590cd895d8ef7c5ea652371c4ae8a0570a0bdfa5da43b987256cbd63dee1. 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/DEPI81904399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e27b50c2b94a85fb11f0c51f6a5cbdb392727e53742fa36634f94b3a904a3a. 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/DEPI81904400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd987df342d896131970ca4a34645ca51630779af1a08e91b2b9ef80757777b79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPI81904401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea3f7b2798e93a24fed9774a9054e872df35ce01248b0f1a048e64ed833078. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPI81904402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d35e350fadcd5a2df78a2621ca3dfcd697824c35a7a96efc714635cee9dba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEPI81904405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639023b4d02c36ae711f332332675cd9a33534a1e4efb02bddf309971f5ccfda. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPI81904406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb5d0b62f198c427e771179e62c136a8be4d65e0b563bdce6391c20c2f829f. 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/DEPI81904403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b0258e9ce9e135876b0816ae07202bf8a6661395baa14957bfcd1e692b94a3. 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/DEPI82102429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd37280740796a3c2091c8bf15bc79aa390839f0f602cab443ca699163d91a. 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/DEPI82102430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5e79e348f78f185bd80266ab394e61094103cf3973ee996e7adce572ec5bf. 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/DEPI82102431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5e79e348f78f185bd80266ab394e61094103cf3973ee996e7adce572ec5bf. 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/DEPI82102431.