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 0x6ca2e89de33242817e381e4817f708722c6f3d1e15916e227345e1eae24049b0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/435e2c28-88ba-4847-9833-dfbf9b8ff42c.json and https://artists.proofprofile.net/proofs/artist/435e2c28-88ba-4847-9833-dfbf9b8ff42c.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 0x7a507de773203e3e53e10ae57076f612044720ba348446a84e230c49cc714a85. 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/DEZC62158321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b979db4c7fda6cc2d48d15427f32fdbac37e637430b12c9e1e8ea63476cd3c. 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/DEZC62170800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6dff1b36202da30c9067c3f9a6d100313d720fedd5f27f01dab9e3e3b18d05. 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/DEZC62170799.
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 0xd10575b7f3674f1c3e2067a7689014fd53efd1393330aaccabb47949bf0c7a5f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62102635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf1500f1abdffdbefe4956f3f8b99c09e39e08696ed892f040c1ae0989e565c. 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/DEZC62102084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bce5877c079e9252daa9558857c2f201628fe00e8cf2c87a46c3b12cdbe092. 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/DEZC62102637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d0490771f5cd5022ec6a93e2cf8bd94f34abcae1d2c227220508010665e64e. 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/DEZC62102638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3c67f6f29076bb07d71e4bfadbdc4fd66fb947c99d6b950ca22fc522c26e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62102639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5629d3c8361f30ca2e6648d3c77b12e5f30fb29d739cd812ad2d3445eb7765a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEZC62102636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0184acd2408a53f22bac8f00b7a5ff84f19443e73306c0f11989decbc415b5. 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/DEZC62102634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f964ead4b1d25c5b16ed0ed76814a6a7ff56a1020b6fa97d37f3176979e4fbd. 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/DEZC62102640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8b0355c4e5a1ac284e46713089e3b2bb84be784fc93d93d03b9b4ad0ae1988. 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/DEZC62321318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be76a4ad9825d2cd0856a95d1c6acd1652e158b8251ed772eca2cbb55b03ded. 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/DELJ82013223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0a9cff35e9dce1efddeb605554ede3c4a47927094e0d2533397c19b6f5351. 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/TCAEJ1927374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938990901972d7024cd3f14e29fb526b3e9e20ce04b3d86a9976d06b341654b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEL1916996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12df9bd9a0b18bd24e7e102036f54c52a4d3c9da5e925a0e69188a4747e108a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFA2023003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950fde1ab0de576cbc8f6b1f3ee1182ce94c8ce381c44811931e893628c8f1ca. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEZC62035648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3937cf646f194c0287815c52afc1818b569437a21729c1e62da7ffdf21447f. 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/DEZC62035649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ec6296cff94956bee9281649dabbccf3a526fa529ba5c06ef5e4295885a21a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEO1973406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc8c49e7ac658dda227cbbfb15df95fc6d09b85a1f37d19221aec95924b58d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEH1947808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa263e5c762c03aac1be81926dcc624c31853a094a255eab161369bef96ba080. 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/QZRP42367095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70966d823edfb145fb4a8c5b5b17af7c3ab51d78161d4d1ae38e6bd544696af. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/TCAFW2120367.