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 0x9607ce8eda550036fbf1dc95236a2b62a02b5880d1c207e45b65cb9eb8e032c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/109168b7-158b-468c-bbd7-3ff74ce0c362.json and https://artists.proofprofile.net/proofs/artist/109168b7-158b-468c-bbd7-3ff74ce0c362.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 0xc7d2dea072f4f5863ce413c4c4eaf05c8e65e2551effc41970f5eed82e77586d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ4JJ1820754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a273d5219cf26a0396dea25a7b1e4c4ee1f3712bf49bb6b43750d1478b35a67. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ8LD1934005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0152674363c466c2fc5b8cb371856009985896396eca05033a2a5d0f404c4cb1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZFZ31948080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c38d1cb88bfc8c3c8c65a90410c2483009f549dfc0716d0621dc2908169108. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ31972030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6df328b79ad87f8adc13a00abd607908ac21192d13d22b70e89b82a63e5e06. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ31972032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bf819f14bdca8ad5056836c93e255488e3937334313277115ee6729ab9f520. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZFZ31972034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc446f1b57ce1a6166b2b2861c34af0d4ceb5df1cc328106e76acfbb466067d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2288787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb1eaa5fecbfc4f5b0d905a3dd3d76c05de73b4fd458300c8423d210c6ed78. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ7W2478488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e6ef3c8c24afe93420afc03844338be372dd98b7386de11827bbf383d89c0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7W2478489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d8acb0c23714c8057f23d09063a6c590c2cd879a204a6e4f21169bceb45704. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7W2478491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f7da267aff318433a628e4edfbea7600642f9d28eeae13c8693a3e1412455d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZZ7W2478493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a34289bd6d5326668b1a9a29971a76ad4ef747a8867989822aba1456c9bed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7W2478494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60d7dc457864c4098cb2909e3250d27b09eca56bd47a6cb4873eb1d1d39dd9. 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/QZZ7W2478496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08203ad10cba23f04dfe56481fb320ebc9dda227db504e9deefeb16fbb27dfd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7W2478497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067594725e3bdb4e151b9716dfdb78c0a34521f77182f25dd09895796fbc3d6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7W2478498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d8da35f0c329847e0a026b75babfd3555d3f2648b3f690e02c7a64067c2e3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZES62547700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa5387bd3bec357a7390a34c5d12480d265a342a060b5a2a7616544dcb77d2. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZES62547701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32c12b118791a72b9d40cf38dba840fb35c3f0eb14839e0529518ad1a45a1f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6F2595686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f5844cca41d7ea681670300678669be22447fe514737875860c3a954872995. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6F2595687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2794390a41b5fe468b2df39965a6b489ccfadb6fc896d691330202db32291b71. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT3EX2575106.