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 0x050f6ff8f4c4891f535009be9d38edde2b354572535fcb2cf1223d77434db98d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3380eac0-6cb7-4f35-b428-653cf956d31e.json and https://artists.proofprofile.net/proofs/artist/3380eac0-6cb7-4f35-b428-653cf956d31e.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 0xe27b48e048dc838c9ac98c4adf30a079e631965d40cb289eaeb25b16014ba3e8. 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/DEQ022291653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cf73558da6aabb7faf59a7fc397fda52cecb96647df84d25f4a261fb7111cd. 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/DEQ022291655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92e36b10b4d688e573b48308ff27d3a58c7657152ee5160d5b1e3f45c902fea. 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/DEQ022291657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0365be22f7b6b50336397e61c4e7317e353a8d3a979d3cfb1f8b55584436ae. 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/DEQ022291659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e1dcf4b1b830b32ef1c3e1deb8bad4996fb21d27287ead7c6db8a53fb5a52. 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/FR9Z62300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d26ca3355633991fe8c71421bc5a78aa7e9232d64c709e5edfb0ac7d301373b. 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/FR9Z62300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b854dab46381b7236618b7c0934ea397ff00823b13277a6cefe53fe6a43ae9. 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/QM4TX2426712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947deaa1fe101a80fd07d3e3c3a8aab2636bd03a64417be06df7e117b3f515f. 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/QM4TX2426713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1dff58c69138000713d5b5910a9e1d9589cdbff5f7c0ceeb5943e3b68f74f. 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/QM4TX2426714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5558cb2e20a74220100e727ef4257a55b1ca6536ad1004c6818af72c3b29fc9f. 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/QM4TX2426717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2e42a5be9f05ac773144cbd128b7d7d4f15d4a222008aa6f194e4a7160b68e. 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/QM4TX2426720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e7cacc3d4f738f0d89dfe5fab9dcdef1a6e6d54f265e08f962361b37831d7. 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/QM4TX2426725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7921480d54c7cdc5d1f54fd13fac983a70763de1076ca73ad3d25dbc9f12148. 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/QM4TX2426731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f381bb351cacb87d83104fd7650b625af60043b0ecdc72e245d7605d3e20e8. 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/QM4TX2426734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7736e7d92746da178eab7b1710132c59d647011ca318433f18ce4553d41d9a5f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5752397859.
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 0xd841a3006b9290b7d8dbc3d6864138c92e3e65d5eee3084efc0399b37c145a81. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES62421332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6c3d8df9f76f97f125ba67362f269eaa8067b0f4fc5ba1b2e91bfc05105d3. 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/QZES62421333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301f78bd3f43631546857cbd57df0d065953b5cfc33dce6a8d4859023db1626e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES62421340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd62d7486ce30a44f32109398c7301b53e4e236bbfe4c70df92241a3f1e2a8c. 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/QZWFF2377388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27da2f261b34d961a2cc95ef506237354d647cb3b96ad7d6b3a60ddd2a15d5e3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFF2377389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dfa12b4e61f712302830d36917e8a460b2dd7149ddb0dc950729964573f33f. 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/QM4TW2397062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b528239f832cea2557d540e4d3892eb240c3b28d331c964a7794b8226556d. 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/QM4TW2397063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ddd910722fff926db553c7dd6462432d561905534b8e68e0be39cae33aef76. 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/QM4TW2397069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65037a2e72e1672a724c071b3295fff3edd5c087bd5dae5e95ae6209b4d92ff. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TW2397073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c16ebe7f5cfc8263de9f47eebdb604d21d0a05f811fbd72ad96b75254ea9036. 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/QM4TW2397074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a127b1f46433728759a202a0059dac944e40591fa90668f7b6464960a577ef. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QM4TW2397072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f02485ae71d17b2733b7135d23243dc65c48b6fc3583e1c3ae1857765454f. 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/US3DF2526294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77facbeac97e771f99468b2dd5c8147e831d4364c406afc43c01dd9d9a48af5. 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/NZPB12403611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4390f73a47cf7e864480486e7a8ff8e245c48aacf3d618974f8489fee62021. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72205261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c56a6d63cc9ecdc3a9247627673f62ff71a9111111b75f48cf5e25589ca356. 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/QZMEP2295602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94add43940848adbb9e6268f502f26d0dcbdeeac54196e953e585e996545d6fb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEP2296727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3edd144cf2bce4fe94883227de7145c610de59d7b1c8ee7b84f30fe003d2fae. 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/SE66N2245222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a867ba5367dbe5c7edf3f92c265a27df029b75466bfaa9aa7b90429bffbac29. 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/QZMEP2296726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99c73328c1efbdb8b6e694032e84935fa3584eb4a8abe4da0676742e9b9599. 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/SE66N2245225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c8c9d8624d323be17cb1f6d2b396b6d7f2a736c8bb7478da61efe53f2151c6. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZTAS2231248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f032955da84c59203e27f51e7d333efdecfc15feffe7d5f3dd7a8d4d55d16c2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE66N2245226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1502b286b822e75acc6d903310977e1d1683f5ac437c1b005a2dac8544eb1058. 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/QZES62556763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65e646fa099382bf5875beda7e1ba537339ab46e8c15c1e2d7e09292f40beb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES62556757.