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 0xda417ced20137bf71371c670f48e09c28bf8b62ed5c19aeeb414bd59cf1934ed. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17b50d05-c4cb-4231-a6cd-c0a3ec4dca04.json and https://artists.proofprofile.net/proofs/artist/17b50d05-c4cb-4231-a6cd-c0a3ec4dca04.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 0xd2740a6475799233b51216655a543653d2c0306cda507447e7bc064a9b298efd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA2B2316639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2695d45d12c5b4f21c995d71d5aaf23706fa1c5c737b52ec41592207da2f468. 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/USA2B2316640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e16844dfbffeb3cac3c901f1fc3a08cc288c48652b354d81323ecbf301545. 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/USA2B2316641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0f24cedaf679cd060bed5214badfc949ef13f30531c67948e13a395e7c990. 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/USA2B2316642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c393240ad056a6f2c358e3b68eb370bc59e1c1d9111b7748a2501780bbdaac9. 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/USA2B2316643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c5b76b8c9d7b6bd2dcde75d29f99f99aacaaac5375afb507a0a02b824fcf7. 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/USA2B2316644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33490bfdac849f3c2c98b309f91321a989e30e79dd2374b173883a0de8373b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USA2B2316645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431b94af7fc4f21aaff7302e92da7390663e8b657bfe64f5dbbd6314f4d6fc2. 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/USA2B2316646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb43e207a771353b37be44a40ffb553cd0a31348ee4175c78d73ea86971732c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2B2316647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132d301894f0b0ed1d133918d3f45cf6fd62c348faad6900b29d28a388f0fa18. 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/USA2B2316648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a953f6b2a431f311d1ca52013a8ef767cfa24f71573e16e84e19abfb2c91784. 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/USA2B2316649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a989bf87c39f2a49d24e561e7a5e3004d3110ef648d6152d2ace2238a9b8542. 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/USA2B2316650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a688ebede2ad812b53990f98a249eccecc5203131956f2c77e217e52f590bde. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USA2B2316651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9729f3ba0407aa847bdc0d0b35eb5cf369fd89f6505aafe26c055ba7b8f8e0b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2B2319484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a0f39f72c8433887a345d8d7ef7992f4fb1451780a64be6982d652ea11cba. 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/USA2B2319485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c9fe7d03ba425cd29bdf67258f87d37dc45ce6ab3d9cad66300ac2a692e03. 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/USA2B2319486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58e0a9414334cff747c0b66d74eabc8a35fbda3912c5cd09ebbc17b4928fb7f. 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/USA2B2319487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad02e7584511ac6bc75f49c6bb861c4475c5f6fa8298f59e6cc832b9b336b449. 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/USA2B2319488.