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 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 0x67cd36613fb4a1825957fda94b38921ec6b2ba6dd054ae67e487c7a8a0e6df70. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a39e324-3654-46bc-9554-30c29d75b57e.json and https://artists.proofprofile.net/proofs/artist/0a39e324-3654-46bc-9554-30c29d75b57e.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 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 0x8e88ddaf21babca22381c43efb589a0cc9f707289af4deef8ad233d4fb53975e. 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/ARV7X2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc360ca42814197b6034e790644fdca02f49fef36d37765aa55d08f7d7b059e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARV7X2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfdcdd16f2b2e8ae7cf687b3b197850c6fecce7fb3b795f3f3e6486126ffe6d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARV7X2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df2098dc45e5be944143c6083fc82a837ccb8cc384b085ff826b6c6075c67c5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ARV7X2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdebb82c5a9e0b13c5ea056f8ba000404e842913e5078f8fee70411c9b85d380. 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/ARV7X2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8347ef432c4032fb3d907455eada3ea5906ebc90e71cea2049461dd2a58d89. 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/ARV7X2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca1da8b52ba74ecfb51c28a7645b151ebd4404c24419d0bf52b97b5cc2ab46c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ARV7X2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1aaa4431c29f3ac13fe24ce6833f2ffc61feb115f183a089411c86c071b16. 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/ARV7X2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed04d36cd9a1feb9c1cfbdc09d188ce1c8734180eaa60d0fec926a973e74dbdd. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ARV7X2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebab414c21ef60c59288d7a577560e8e216c2b210294f64ad02e3bf7da1495b2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARV7X2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ed57195c3b3fe4330324cd1924a8351c21f0ff153c3969e7f458fd51fa503. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ARV7X2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b8d782843cd6193a8e5add93efd346da9e0e7c495d2a7794f740421b80a0ba. 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/ARV7X2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc360ca42814197b6034e790644fdca02f49fef36d37765aa55d08f7d7b059e8. 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/ARV7X2000030.
Todos Mis Amigos Lo Dicen: Estudio Bulo (En Vivo)
Balada de la Clase Trabajadora Votando Neoliberalismo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4032ef7b2b7e1789444c7d837f2ada4fd58e15f479779f5109a115389247ef3d. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ARV7X2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cef598d8cfae963057b024cff0d5922106b5c4996d940e371dda3a481d7558. 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/ARJ5T2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbbbfae56ba201ecdb616637981c0fdc6fa0b33426ce51724b44ac31bf1525b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARV7X2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2238e79bd66bb38f6cabd0fd7ea3d88a9b1bf36f6d67b7d04552727ea74e2677. 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/ARHSB2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0443b44012a8bb52deec90195b74594003896469bed684fb78089f6db153c38e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ARL2P2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880301fa28ae7d64e8e9b0ea69fd3a3aa1d5111bcd06ae4b330ac905867bbb95. 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/ARHSB2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa9c52ccc2b2c2d36a89a6975510b6443d318d0c7b1063630b10f5748a7c8f7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AR3492300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec19109fa12af469bda43be359e72cf399295324ae3295ebcc363f75deb74ae. 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/COA7W2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130439d0501d3588b2d5a700279e624fb21a3fb8a2ac245665a30079d4616d8f. 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/QZNJY2471967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd98ce6b85c0d7cd05df7904ffa1fb090c74322f50808f37267bcd9221e49e5. 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/QZNJZ2486866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ec70306af582372e1559ca2b77027ed8f5146d00236b8a08ee9da786538b09. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTVM2476846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89a1e140ddb8233d90fd466a1862664ec8d2c356571d3f58b5de6a8ce0a6e6b. 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/QZTVM2476847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188248202b808a365c74bc47c98b96791458ee87a47c39713dac9eada85733b. 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/QZTVM2463958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc09927589cbd562f19db26db094ecd38b7e91f71a9fdae16bda7a9b7dc0163. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTVM2476848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc811b98d35a65fe5ae7f07999020ca615f4d42a125d149dc4f7d0c870aae786e. 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/QZTVM2476849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18c13c75984a2e218a73612f7760bac339c5ab23d07555b5345b974d4740afe. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNJZ2487006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c30d746393c522781c12811f5951efb78a17c937b8e69faa694d305e109fcd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ5AB1933429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eddf96bc25ce04e7f447f6492089058389cc01c956fea56da23286ffa7deb7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZ5AB1933431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd7a8f83d56a80b3e23dfd0f12a3a28e6b8d796db93cd8bf753382c860961b. 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/QZ5AB1933432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfbd94d45b821798044bc08c93a02dea639a2b0e66a5d82acbcd4895369fdc. 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/QZ5AB1933434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15579a759c2e3c7b087b9b67b77695955f7b8adf661f157fb818d488817413. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ5AB1933436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9ae72e43ce27fbfa149566b2b21525127c17cd139800706079be1805f7e92a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ARPOJ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190dba230a36eb60ff0805d667783725a7d8e2dd4f32db803edf17f17e085b7. 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/QMDA62392976.