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 0x298508edc2ec718a3e35412affa4f88f00dcca22b175fc8cddb06b25d287d05f. 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/2661e136-0e07-4e68-b86c-b52f36aa221b.json and https://artists.proofprofile.net/proofs/artist/2661e136-0e07-4e68-b86c-b52f36aa221b.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 0x6466df193d14d51fb046547d221ed48f507187ba1e4188da2555bec8059e8092. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAGS2385480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb8f1d1359a1277a1425b15f41f270ddef0d40bfc0a6905cebd8e6b5c683f10. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAGS2385856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f5129c00efaddef55db1f02d171896bd07be83e8255ce933e453f99ee24fb8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAGS2386098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f4d6dbb1a942c6824a29c7cbc598a8f6dbc2f7ac1ce0a9997da44c1b48fe7. 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/TCAHC2307452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f043a096895ac16547b5804c7c7c4b70b405d7478c5f653e07860f0cbb8410. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCAHH2341858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b90ef3023b217d0ffa095ae4ceb7a3124945fba26e6e9c395d6ccf873fc1c25. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAHH2342017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d958de7eab7d694bf768bcfe42444beea707302620e7d4843ee3cec08b2b447. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAHH2342834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ff36e66a578e99cc4d0f516671a64c6c8b212b16e9b19d1e8c0b1ba8d9e251. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TCAHH2342840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a3645a48f4cd0801eca1cb20df48d11cd46baa5e9ad6731e238faba0d6d2ba. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAHY2455453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3c54f1529f480de74463f8a1cd4de40d56a1c7114665f0569fdcb1d02c5013. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHY2455536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5878a1afb204a2e04ce6ea24c04b0f295e454caad0fddf37c3a70a949de9d19d. 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/TCAHY2455618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c515fb7bfcf5ea7d1adf47a875699b71e0f20477f6cf395f931ba06117a659c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHY2455657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbcbbb5ada610aa6db1af3e03a70ca9f6b4ee7f26c09f3b4a78c09ffadf535e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHY2455682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2957daa5ab10f4f4049435e2db2a7ab99ee5b87d915611c71c2e209100cccd2c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHY2455716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf312e74d189115be16876dff8e492e4c9f9f0aa0ae8b21dab1a8fce92cd62048. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHY2455801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfdaea1bb08cd3d48f78efe60df0bfc6486494cfbdccad3550cf875ac927df6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHY2455806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91918e10363de5c9dcdc7785f8d4e4c6b8f0f15c82e01b9a0c68f734ae027312. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAHY2455817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9f3cae3742e8f97920347a06248dd3c87840351ba7cfa1de8e80f0dd2de42e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHY2455875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64f30cf6b707db2fb56e3c9f86637a23696fd6b1ca5dae5d71ff18a424283a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHY2455900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ae4075c7925f603d2ed5eb4c183108639714de3ddcfc93c77c4a568e8c339. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAIO2493911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2797f44e2efd6de02a6cbda144331da4573525aaf949e5090e2486d44328162. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAIS2489031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074bdd8362f3599401cbf5d814e18291037c8e25970d7f52e59db729cb9447c6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAIU2468558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e26a6deb691f400575d4cdc780f58ba19ca69a0ecccdcdee8bd318a6ced04b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/TCAJE2544139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c901b7d4f1c4a6c8813aee7194c43e991acd0c4310aa09a9fa04a90071467. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAJE2544149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41820e739bf9a6ba496e9ae8071f546e0ebfad62bf3684d80a413775fe9ceafd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX282546917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7221f62f76bff9e2093c3cde135834f7323714f2127915edde5e1cd04a7264b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452501242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e9ae1d3f1a6a4c8ef2e07664069b2fb28181d8512c88723b4254eebf362f4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452501244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5317487ca5b99c59b45698ffa6701a6461888e2556383d28e8028e7a971eb7e4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRX452501245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5070db7fddc2adfa5832ff1a4aaf51e0eb711ce6b644440e9e7e0458987b472. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FRX452501246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9fc1485d3e398995f0ad7481fb4025462d226a828d419f10fc54ef8144aa8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX762599229.