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 0x3b7972709c307b19216f8284cf86f179087c9154be3c2f74d6b6a6354d09e175. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46ba3807-430b-4d11-9a47-292792dad43e.json and https://artists.proofprofile.net/proofs/artist/46ba3807-430b-4d11-9a47-292792dad43e.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 0xa648029e9718bfad1dba1f2b671ba6a255e8d05b54c0482f92298bf47f194c06. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKXN22331497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae656e1daa38f714ca0870624d1ebd1cbfc26a218a7323d976d8ff56218d5f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UKXN22331498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84fab2b8d52c107ae89a55e83db18cf1b9d99730e3a84b9aee85f9f6cee779. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/UKXN22331499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ca35b1ca8403a299d4de59b0190c18dbfcb62ce3d5149ca0e5b16090d175d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UKXN22331500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff60bdea3e6ab3b0f78098f7c59ffd2b74139ba6d851e5064d4b7ddbb2d882. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UKXN22331501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48cfd00bae6f91a0d8a1e26a702374d95a25a274d2ed212cb7a3afb233f16df. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22331502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc098742cedc1032db60ef6478e0bad6dde68dbd17bcb3a88466cf1ceb7d10. 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/UKXN22331503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f370e5db5d7e68cbabd1bee8099adf2cfa82edc78faea9b9afee42c94a27d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/UKXN22331504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf75ac28f12a224e134cb86aaacafaa1c29e79ba6cd1906534f3532b9534e23b. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/UKXN22331505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a70e4cafd8c611b6f0f1471db55079ac973d61becf76ad5e0f9a6a87b91ca2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UKXN22331506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bd5800c7b838f7776abd837a4941b73263b257b3de46cf2ea930b9eb734e1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22475232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169d40b6c6dec457bad6f127afaedc52e7cf87d4bb81e4f75a8a612ba50e13da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMA22475233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aef928e8f9cc791e502e5329bb4e3ebdc667eee0bb620d19335c4e2b051e87a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBMA22475234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b1b564131bb3e91e69688903374fc4103fddbdfebeed8cd6233238c3a7c8f. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/GBMA22475235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1360faf033a8d20b70603304a05f586fd12bfa5d25184cc10ad77133a4e6022. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBMA22475236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ade4cd7bf11efe6fad59ffa7fd4cea47bfd4a7365324849d5cae0f310534f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMA22475237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbd6bdad065c5f59cfc36029aa556ef27805ef0dab2bdac2f4acc495b48fb54. 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/GBMA22475238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d75ff0bf1e99ca196bdc80ef58e054cf271fcfbe7a6be4c0e43a71904595f30. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBMA22475239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2f84d0c48bd9c71cbbd7de77a004484d1651e6cd4d14d277beceed46e5da94. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22475240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce1146da731ae0f9c44e3d5d49ac624edbd17cac5903745b863d2983e7d1b3e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBMA22475241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8049766392a35be4cd111e8ed487a62495adb5c2c5d89bf377ff8268c20fba7. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBMA22475281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a236198c80c592fc9b6eae874cedd01fb92683ab5a2d5d9c86f1274371ad08. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBMA22475282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c77bdd91ff7727d499a50dc19ef60a647ddbce3447a924980732e93f2d5c6e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBMA22475283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2c85d67506336eb931dfbfb481425ec394522cfe5fd60bfc9308a3000d3552. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBMA22475284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e066778bcdea3892b484b7a30343d1402528f82c31f944347a8eedc63127f0. 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/GBMA22475285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a86182ee2613af2b8882311ac321de1c1e0e141f8b2225ef21bb21c4e545c3. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBMA22475286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc02e0df16206ecdc0ff7bf95dd5b3f5f6932ca906995d7b8ce025699fc0621. 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/GBMA22475287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282cfdce9c044d0abe9134c7a7f5664a87f8582af45493c729b36099a3cc19d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBMA22475288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee38b905f430de2c5d445d3297fd40ae8511620ae0b9a385528a91abba9d02. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA22475289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daaecca6e8adfb8f09afc7cd358124f6c7fa990ae19b47cc3d9cd1b6a430eea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBMA22475290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce9df2354f3e26f52b750e0df9c743e222a25156291657b9aa845102359b46. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBMA22475245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd167cd7bf71fc699937a4c3fd92f5cc67d90577cdd6aaab5046383c1fcc0b22. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBMA22475246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027b45ed2e2775e838b3e4bac9958e3b6d6739f166b6add8b47987a6352e8ca7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA22475247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6470a42b9787b34f9214ea7d5d8eac133adc503d63abe5ed8c26b712db652f0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA22475248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f9bca9e7ab17e7a91c23708d92d325f84befc0e8150a2f33b651896e86d95c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMA22475249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf31699cb8372ec4f63c4015d84b1845652a045771caf283110c412d62ab544. 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/GBMA22475250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64979532d4d0aabf9840f6f3f95d07d807cd37ade73392129030ad7773b9b480. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22475251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3592885610927e3b6ec964179656d51ec27606e18d56bc5b128db3060a2db7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22475252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0021d4f7f55211d962ca4d3cdaedac09eb4773257883302479248f4d5c23645c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBMA22475253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf246bd6cd9579f0897fe4fa6db4bea4c2bc323ccb00ebf0c7f503017bdca2d63. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBMA22475254.