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 0xa313f72574818efbbb2a9f3929eaa9d34506ce57f4554f3d85fc3a947f044730. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fac023a4-b0ae-4df5-a926-14432b6446eb.json and https://artists.proofprofile.net/proofs/artist/fac023a4-b0ae-4df5-a926-14432b6446eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
New Indie Folk; January 2022 (Indie Folk Central)
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 0xe6d10e8247c1972fcaa71f92fcfc0650c842e0cceb6bd7cf18e1414238529655. 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/QZK6P2435453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f6763959e00dd3a8244351b630c34daf4e46c8f81182176a2d7e64b775231. 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/QZK6P2435454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c565fcbf2f218993d83b35489bb28758fdd5a448c2962f0173edf81ab1c63c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6P2435455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b449d4f28c5ea51bc36b52f476661c104b9cc9b04ac70f2db943425f54b1f. 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/QZK6P2435461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578d29f50e7018cee6b8fbc6804a93c7adf49b4b52aaeba45a4e7c87ae4b556. 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/QZK6P2435463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aa6e3ea4f2b480b7da9282611aca298d4ff9b039e69a568e3dc54efd97a6f5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6P2435459.
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 0x9a5d1d3ed6962f62b8528a5f35d6feed906674bd8c3d767ddbcb2957a3c6af8f. 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/QZDA62284322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c64257d1a0054816e71bc011378ba263c128ae62ca616cacf7c4065029452. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZDA62284323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4cf81d306a74b50d408b645b839d768ff65a2d0e72e179e1c12a339cca91ff. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2180792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3956735887573a3619940a16b614f5b1cf7d85585102246087e750bca302ef53. 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/QZHNC1936057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05eb73295853373c043c0056a816f37cf4b5b78e6d98cfbf06adfa9e1d2d001. 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/QZK6H2180793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa12d34629673256917214a08d9d3592a06f4c5e155ce9575ed5078746faab1. 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/QZK6H2180794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fde50a540faa518ba150ec8afc596a6e3ec78217ec3b6ce4414ff3853d8cde. 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/QZK6H2180797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6cbb088047b6e8c38ce092212e7059fddc2dcdc0e8c72201c884c9d6d6552. 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/QZK6H2180798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0515feba094a775de23260d2347e24292ce2543fa5a388e27089323e1784c96a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHN71943600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f3417f928da0c9734010ba722f8972d6ea098e547a523b6001d7fe305a4a20. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZK6H2180791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad47ff6e417c5eaaeefd50e1dbe1ed841600beecab9d3e93642b4894671c041e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZHN71943601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bd7c4ed3174508f3226fc36d35c2071d9b888cedbde27a4138e5a58a13ffed. 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/SE5751890183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5242a3a245e18dd2483a1f28c7c37d371e3652480c533fb50f3fa1fb4d4acf. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZK6H2180796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347b52c4382360bd2b1b2b6afb6c1338ba8e8f75c10add596ecd893a65680e02. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6N2029194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523f6a0282294219c32518cb1de5ef567c57ea0832c208c826263bc70159529. 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/QZHNC1937262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4706bd5784c405c87e0432692c4d0f2bdb5efd53411658e01ddfc9c802976831. 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/QZDA82031031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff293260b7c91b0ef66427eda509c28d6d87aa04ca797e670963fd55fa4bf5d. 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/QZES62066436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8f7441d88c8c4732ff20d81db29d4961d548a61f2e8fbfc8e2755b809a522. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZK6N2029195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe052b238f03921be0eaa9773b9992a061ce2d3c8e629ba356b3ccb4ed2b3e62a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADH1721418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc32c67be6ec957321ca2ba380c1bdf92f9b56f2d0c2b0e5012de34c4e686c7. 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/TCADH1721431.