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 0x696837f7a377ef7358cd828b498f9d3f8a76281e8586da23e2586c39900f4c10. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04c820d8-533a-462c-ad67-85aece7e8fe2.json and https://artists.proofprofile.net/proofs/artist/04c820d8-533a-462c-ad67-85aece7e8fe2.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 0x1f62fb11f59cc9272bcf43d72824103aaf8f874197080c4db502e88bb63b7294. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ5AB1765697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f38f8cceb47e893a00aa31557e376595c26c53ff1312b2db18686507b2d08a2. 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/QZ5AB1765705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89520d1a5164b0bdc9f82785420711c4eb3bd91871e72cea475314f016939434. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWW2095986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077a7d1692e4e22b989aee90053cc9f5ce4b3d6d7b0e17c1786d642d4e4b180f. 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/QZGLS2168268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66daca83371c85714dbc4060f9e5b796fdcd49c31fcbd49675d157d73088c558. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:50Z), 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/QZGLS2168266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997bef2b98e256755633cdfeee93e2712ee98ccd40a9920e35a5de61a2bbafe8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEM2119554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51b491353054e6147d4062727fc754d0840d1d64c941e24d9035a62de8bdbf5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN82226249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c339cb1fdab9b7f7474fa9bcd2464ad81a190f043c1fad0d6851ebf47cad70. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN82226570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c12f666324fef9d259d782ff95799665f6fa888846b2787c5855034547875. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/QZK6Q2249226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c47fa3445f109f193c2c0cb95e825d9dc39afe61406d2d4e7e8e226c26652e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2391901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e304d9a2b8f90306f3ec4422cac12d2fe676f853f2e79ea21d04456ae41f81. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZZEC2321599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1233fee5fd03ae6fc922d6f7ecba9a1fb1396b9b48a978a0f1ec0aa66cac2d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42302822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9201f79a470c50120a990b91996f9320a65f3e5197078cb9432c2c39040a99b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6J2104021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8c14620b11a26e877c656de6a87202683f5b09ec5f2e81477e40fb77d7f98. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES92371430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4e517a570be0c1f8111a55600850e94d49b77e1e617acfafa50ca62154915. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6H2220801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12da0b6afb88d8e2ac18a2cab6aa11cf10958cc4e23f049855fd80ef7d6f86. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBWUL2556775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c76cd3ea4e77739163381ec5343a4147aefe254f96a2e498b428f9032b8db5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBWUL2556619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc431cac9eb562194943a6e50b4f2f7f032290936e6f5f18ab1f22e6a8aa6c4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDQH2523072.