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 0xa6cb580e6bf99c39ecaf5b9dedc28bb71dacf2c7c273767b3e3866fc63dcc5a2. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad47fdd-3376-4a65-b7f8-df28e0af55ac.json and https://artists.proofprofile.net/proofs/artist/3ad47fdd-3376-4a65-b7f8-df28e0af55ac.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 0x2b24a6cfca619a46062598f6a05172f6c4e25629b19d09950c73fffa4b421c5c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:35Z), 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/QZNWT2043309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ce62fa331e37639464ee6e09a014047323afb8f4a0f0f69889050ed155811. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2043310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd214671a8f0c7b25178c2a1f697e1d58d707f42b20c5fb78c698b927154e8b7f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWT2043311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d542de91d12456c861dfc60a83d94d5a7ab1ebadc942ed7082b4f3aa5e61202. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2043312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca8ade128ef8e0077e02c37de3cdcf7169bcb592d674215e75fcc6b6bf873b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWT2043317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f94c9fb7389f3b9c5c5a48057b88cf3802c182adbc813ac5439b59afabe486. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22270133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2527c31d4583d86e317e08c921f76dc6b07fa739c376c12fec796de39b696. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7S2455554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe597d55280a83ab216573ce63e5cc55e99555a8d2919747b5f583f241b127259. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ32589614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcde1d77850b4b6066659a3e838ef93e026374179a2f3fb5b517db2a12b5cd2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZES82507808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08d3ccd8f878579a323ea6fa656fbc4780b6bd4d384be7fee3c3d316e67a89. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ7N2449630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2527c31d4583d86e317e08c921f76dc6b07fa739c376c12fec796de39b696. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7S2455554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838b9745305ad4b3d52c91db5327a98e3cd4637fe6f763e1714ffd2deec64ae8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:16:50Z), 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/QZK6N2522949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c3a3386708846ac9ea26eef2ba2ddd3e5e21df60bbdec6a70c518244462da. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZK6N2522951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d8cc4021818c939dbba637fc4f97666ace3d45180e42b82f904b869a0163b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6N2522952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544433436cc26f22b801dd45c2f30dbeaa44a19ba3918931951d605220a8bb78. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6N2522953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe597d55280a83ab216573ce63e5cc55e99555a8d2919747b5f583f241b127259. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFZ32589614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1930b44c587ae6761610ee5cae12316f9a28122c5e594347004665813bc06dd8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6N2522954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1fad03215f0fe796a46897f406efafc34fdfa47ee1c73d5155a6401f3c8d5. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6N2522955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcde1d77850b4b6066659a3e838ef93e026374179a2f3fb5b517db2a12b5cd2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZES82507808.