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 0xa182b7473e9c2cd91abff9b6895ce99b1170d5cc9941889a3cacb037a9907616. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56b1ba10-3eb3-41b3-8b1f-54a43ddb2a78.json and https://artists.proofprofile.net/proofs/artist/56b1ba10-3eb3-41b3-8b1f-54a43ddb2a78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Last men standing (Roey Marquis II. Remix)
Last men standing - Roey Marquis II. Remix
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 0x663c91e145c23fe8c4b1af4b7c25ce2c4795d830fa28ae6419bc71cab4b11095. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CH7812419807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6858f35f55c26a8a9acce0dacc44a942f5e266b9f973fdff1ebd15ea167b9baf. 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/DEP552005398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885c16db2545aea4bcaf59f3b420d2b83114d18d6eb7dd8eff978bdae74e287. 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/DEP552005400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7639ba1da0de64d6b4e837320b6bbc82b9256c5f79432b9dcff23b0716aabd2. 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/DEP552005401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68cf5995a952a75b8aae65e36a39192410310161c070753d25741e8cf7340b6. 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/DEP552005403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26457acc5a84eba418b5043ce47d46c7239aacede8f9afcc07a901a4017ea95e. 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/DEP552005405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa9bc1ae4cca96114605179a6cb3dc60cfbb608e93f65768721218b04873eb. 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/DEP552005406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa85c82a1a26c91f4f3595718cc31161757e2450fdd36c84f18d2968e5221b1. 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/DEP552005409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320949cdf7c0ca7676bada5e247901f3a3026e94f1347cd5a56147799247da6a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEP552005396.
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 0x4d07df8043ff455d3cd52497472a3489286bf20c59b307a535ae4e56afab9563. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/DEP552005395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f1f31e15023a147b6cca38eb37ce5c51b3184f6975d2060a8324d23dbfa00. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHP2345072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fba913381cc43b5bcf63dd9fcb37e54428d0e43854f542edde4d97d8e2f6c2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEP552005397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb92cfbf52063322d31aace51fd38a83eef962bbb46005c612aa1870ab9385. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEP552005399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe3b748501d2b8053fd3aecbe91e5467099b656a7d94f02c5d68b9dbd6c90d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEP552005402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f636952bb1f538871663ee5423c340c80b553a47d1e14d479f95fc965a6ec84. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEP552005404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b213226bbf1ce7c04ea665287f4befcda016d968bdfa5339c3f551a751f35f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEP552005407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df94673c8c4f4592d9a943ddd6fd4dca6da05601463c6b862ee545d5c9849fd. 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/DEP552005741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9102ce2dc65e19a14f7ef03f4d7e0e7a998fbb4847fedb78b3a3facd301d9a0a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:53Z), 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/DEP552005792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7380792a6d7a2a01495fcfd7f92f04acb34eb29fa2eda345e50b21d0bfd8b2c8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEP552005815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2064563acad8a9af70046fa2a63feef6dae259cd5c5cea18adb24b16dd92ee0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEP552005834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703ed9b5e9263d4008df39278a243e8667bd29c26e1d9bd3f94a33e1122815d3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEP552005837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cab3ca0ac14539a89b8b2a17f6d2b747f56d2a106ce9676c6cc74d8e7f3f59. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH7812534402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4b99b7a7ebd189d1defce60970d391d992b772961c663940cf4dee9b8e8975. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CH7812540102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606684c6d1ce143e90bda56c4c8d56f9f2b116beaab7b6fe487b87747fc0f613. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH7812541900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78583251f69318992e29be15ae82078bb8f1783488e285781a67c60477b93823. 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/DEYW82415725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31ca0f4a57f0cf8042de664c368de459bbca3ef1035f84df2c487c8b081034. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEYX82237869.