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 0x9557faf34d621d97c4ea41a71dc2ea732ad5d27fd83e15818eabc9002dac97fd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c343a883-bd8b-4e4e-8b70-7abc66d74b99.json and https://artists.proofprofile.net/proofs/artist/c343a883-bd8b-4e4e-8b70-7abc66d74b99.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 0xdbeb980995936e3394e26b5875be5b7c8626cf14febf7b6095398e86243fb873. 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/DEE352312635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e357d3fe605a98cb3418b909cfadcd9436a137253a05d00816a7546b2c1b71. 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/DEE352312637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa061da76478c3dc3091be07d4cb2e235b5df5b9241352240e54b08ec06ac32fc. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:49:35Z), 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/DEE352312638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ba1fee48c968dba36fb6e01d0a4a38658a693a414614460460a5813ba176a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:13Z), 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/DEE352312639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2317b7f8b93ca7ffa87f4042d7dec55d283e39058dfdd5b4665471d28d856c4. 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/DEE352312641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1477b6316d3cb9709dbf376b46f8e32dbdab69d7573689d7d0468e1060cd4d82. 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/DEE352312644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb180c873488badf27d915bae50d2c97b7897679cecd84fac9ae85b3fc83f253f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:54Z), 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/DEE352312636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4200b47544831dc701fd975153c30e4e1ab103e397d6314af786ef405b558. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:20Z), 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/DEE352312642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291415c0bafb8bed5bdb1ffbb03350d462a5606dfac871cb1c38da3c4cafe1a. 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/DEE352012285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6310a6f5dfad6db4170c7d672cad4cfa4d8b5e9b84b639304090dc4f523a87d. 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/DEE352012287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116fbcbae107fe948ed87cb859d1f6e26c581e18bf4b66e09923e70adc7242ac. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEE352012288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4876adb963536177f03e7bf7101634202390ace15d299594b4045aa47655dca5. 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/DEE352012289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaba228be29e2bb99275768f9edf8114244aba545eb3048738add5acf1a8ee31. 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/DEE352012290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996992394d46a75ba41fe8aa9d76e5728dbba92219adbac2f67aeea5bd3566d. 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/DEE352012293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40893e6c33e5f5fb222968040d78fcf0dab6ab681b3367e8743e01e7bead9f. 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/DEE352012295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2a321b7ec11ad0bb3c835f52254126b682c8d6be2a3bf841f179530f9c0f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:44Z), 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/DEEH61700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f64aed95cda062cff86501a73b19bab524a1d7ade5e1be58702dd761f0dc303. 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/DEEH61700911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a2637ccc4bb4c6d3616039cb680e0e1216cd9aaede7479d45357b4aacfec3. 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/DEEH61700913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bcfc337e4abfab1ea88fae857e5c60f48b83b449cfd1b0e7a6914993130f81. 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/DEEH61700914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6dc65190ea6381bb7ce6e36571bcd5df02e7555f1f73941846a80f3293ebdb. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEEH61700915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67874d34ed560d14a294fb84bedea5fe34d686cb050057ccb3d578a30f1b3eb1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:32Z), 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/DEEH61700912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2317b7f8b93ca7ffa87f4042d7dec55d283e39058dfdd5b4665471d28d856c4. 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/DEE352312641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7720f23e839f03cad3ad823566fc0bdfb4be72ef2c0bb4f936f4d6155350c7c. 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/QZS1Z1606645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee821da50f80f4fb50779f8db0fc1a69f366cd28d01737cd8257dd74eca60c28. 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/QZS1Z1606646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f005a56893bbcc8445ba849ba5f448f725ae3fb641cebeb62d92211485c9c7. 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/DEVF41600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa82c7827e4d273a4a8ac08ce3310c8d7ee0b95decde1c304520068a37c3a32. 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/DEVF41600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe6df8e57d26ae0cad87662c0daed65bb37e69248ce173910c9fc5390fc3695. 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/DEVF41600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537707c640ee7582df7b3d346c0a116f7a2862b13315d3b65e8a4626eb9f2ab7. 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/DEUM71600675.