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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 0x77c7c6e8f03ad0ebdc0949db7e0eff8d5843c9ea2e4b9acb9e71cb616e9b2bae. 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/db61af34-1ac9-4ba7-9e3d-5a5f42aa6d6e.json and https://artists.proofprofile.net/proofs/artist/db61af34-1ac9-4ba7-9e3d-5a5f42aa6d6e.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 0xd96c4bde9698d48b632ef0abc28071b80b371192e009b11327465e66fb732181. 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/TCADA1744893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cfae137cd538e3185c94726ecffb1ce7e3953a6c434dbbf3b08a8125505f3. 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/TCADA1744908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7686dec87079f30da8bb49d421c9c25d7aa041e1fbfe96d79fa40243493e800. 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/TCADA1744910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3803645d1dadad50e3347df6c190a5f7b69d7e5cf24d70f1d828e96677190. 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/TCADA1744912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c777a9d5af7c09d19814dc56f7dcb090a7365cd74e42698ec04e293beb5d0e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:02:34Z), 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/TCADA1744914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ee95ba5a237ca849a07263126e2c29a4f3bf05934c23a350273d35359f43dc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCADA1744915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b42948d3c6af92133a98af07534a8cfb6dca935b7c051f5258ad070771954f. 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/TCADA1744918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b35263b434e4559a62119e6582a4708c2196d0777900095193691148da1ce1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCADA1744926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1420060699e26c419e9b7b5c0640e39bf20fd8e1006ae77569c3950e9a3b30b. 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/TCADA1744931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e8dfc4383cd93c4376d1b91cd5ca6cda99d096cb278f694e4ce878bfda648. 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/TCADA1744933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62673abcc9b9bfc1da662c0b94c23d2d04b4f44a65aa425ef51c1cf5521bb8d8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADA1744929.
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 0xb6d4ff4c39edba7457cd45d44a6add954e2343452f87f535cf36716803785875. 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/TCADQ1833269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9ad17bf049305a03af26c2d36fdc6fb9fd5b269af3ded765116ec6b23cee9. 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/TCAEJ1966815.
Blacktip Reef Shark (Carcharhinus melanopterus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4847aa259162d98821dc6103510103ad8b56366b188652b825ce5deab0708825. 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/TCAEK1906606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f720c83bf8c1e5d6f245076e9240d79fbea591ac9b3f619e5ac41fc75b18b3c. 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/TCAEK1906609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2e77e39199b7cd73b61c006825a4968c5206437f081fd26e5e596057ced418. 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/TCAEK1906613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22f7d7a56c425f6d90e9d2897c257e26068bd6813eb9cd652f932aebdea8532. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEK1906623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b78c476c939b3c941cf257ee08bc1ab3355ee7295d2afaa06181b45433bc6. 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/CH7811927498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b05fa712e7f0c05ab5de2e88ba35b3d244e104b52240ccb26ab4f13bc9694. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811927501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b3eb552406468ee300acbd63acca273b307ee61e0fbb64520645f617f0d4cb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811927502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a8007d3175a292fff6898eadda18232ca574e82b16eb4814ba33e52badee4b. 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/CH7811927503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b43d893c0b0e16c3d0e234c6bddbb197e3d69587b9447b81683d43eded3d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811927504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c2bae520bfe48f04802edd69cf78d31da8adf22fd1dc59de63103be9281ad. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7811927507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c233512bf3a349d7a25ecf1f7533fdf04c769a3bb296419d054573cf9e61a. 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/CH7811927509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf8838ebc562a7f5d9b41441c6ebeddd9d3be830c607f1f351f3a4674a0f1a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811927510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6811ce7f124d0655429a25b05942141058c4e3d3298d9ba635dcfb42950673b. 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/CH7811927511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345429797fdbcfc80d7262167ea0f0cc97e4294bcb4e28a676b590b95d9014f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811927512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5256e65043f4373d17e6934d70a1d860b40a871073c7ddbb7d2ceab4e5537c46. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/CH7811927496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b4f828bf03f71ec435af717015bd5984e55e284e9389b90e3f164c5903bd9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CH7811927497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e2cdcba85146e04d9a6268abc5c08df60cf520bc1f5b4c713ff57200657f8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CH7811927499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4808adb316e6d597c8d6d9958b2151fde4cacf9af85e16f2d338fada5615da. 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/CH7811927500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da918435f96d7c81118da0d5fb42e6feda85e63e007d867a2508fd1fe6aee4d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CH7811927505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685138ba588f5fd16d871fa503037c8b590f32b8e4d3c6106059a93734cb2d6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CH7811927506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7188cf125df0f02ac748e9b6ceb8614ced00bc8cc70da9dd3bff1bc00806d8b. 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/CH7811927508.