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 0xfb304319b777dfe07becfa77a2a1563c25bb3e6333b6de016e1de291239645c5. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65d368aa-bb77-4fc9-9bf1-4528998a4561.json and https://artists.proofprofile.net/proofs/artist/65d368aa-bb77-4fc9-9bf1-4528998a4561.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 0x4b6ce211aeb5cd874452d7501b3f14daefbfeb4e508dc5fdb774481d9eb721f8. 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/GBRV32000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7589a6895d5de54c8a10230eb5d4313cb15b2331054710732691cee519e48e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBRV32000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391bb6e7bc8925f3259ca0162752d1e520ab00238ccf4f709c501304384c2ef0. 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/GBRV31900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439b325e690fc530171425c7a55665e8edb419e5546f6a3f1a089c05e269bfa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBRV31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2a1ced997aeac2230b6f01698dad0fc9d358ef784f4fb47cb5683af173b5b. 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/GBRV31900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687538b3bdff3a45011f7733b4123bf35152cb47265e603bf71f319b9b94a6e7. 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/GBRV31900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19cd0b138f28b8c89596330bb7a392bd0d2f515a788375f0130bc244026080. 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/GBRV31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe529e6390d970d045d594673acdcca4245088cc4c1ce134952bc04ae1c7b536e. 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/GBRV31900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb65a877acb74ac97d29c252196d4b4eecf00f6e101f1d17da8da5d6cc686cb. 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/GBRV31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9db72350efb28f2dff4985fe3f4d19975e4350e2aaec8e84812b9e19f9203. 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/GBRV31900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd820e1dea8abb3a7b51e0e860f74ba20f4c7111bfdff148e5f3beb7245494622. 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/GBRV31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9cf03ab9e681c58a932e741ed74b11c0af84adfe1f719277b1a2a4ef106cc. 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/GBRV31900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf9fbb749127f1b4488868d1b9be6b6b057d4994781bff5fe48eb506d9f6c67. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBRV31900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18d05e3fd104820f203bcca6313d55f486035fcdb9f78bc1334f7d5105c2d5. 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/GBRV31900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea183d56ab9006c1698dc7a5dbd5236758003ebff7f1e80ff90586290ef30396. 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/GBRV31700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c43f4e860c5414b14906ac6d04c5ecb56708365a161ca5ff01dfbf75465cd1. 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/GBRV31700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b387dcaaa5dddc066cd0d424348e7ac272df02a0afef305c8fd617b9c3f6f1. 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/GBRV31700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c536bff1baa2815df011a3cce350b7fdfa8bf65b199d1e33b9a643ba0748cdf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBRV31700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeb9940ba3b2a929b57fe9b5555d689ee6e7ddec78670aa1531c20678ee62fe. 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/GBRV31700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ef5ead6331103543c70ef74a98013082aad09dec91c81dc50bc3d1f5b0bfe. 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/GBRV31700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb9cbc8af25e5147f11c24e613bb4ea1f26b2f99ae755a481bfd0905e326451. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBRV31700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab4ab0e28840706e1c4510e84f070fc35854727ff08142e1d3bc7f5feca9a26. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBRV31700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52844f1f6e056465af24efa62cb44573755a3430e959d42b18ec1d404953d363. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBRV31700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eadfb3030283ba53cffa3e953b492a411ffd98d51f51ab3ef3e34c422a8be54. 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/GBRV31700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6812c83379d07624d0c3b009d227837f754f45e847ae089eaf32b6d72850e39. 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/GBRV31700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ef1e481ee1cfc2cdef4b9c38bb706fc98b626d1f0b4329e5eec5ccde0ea69. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBRV32300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15192ba198f8d2998f8dcf7a91e26ec21afb401b647eb3247806d7e34eceff. 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/GBRV32300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793f7dcc8e6fb43253df699ab34f392e708f7a140c57f6c548526a602ac23e52. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBRV32300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726e1b6b29eab37bf7033d699b00d756a99480cc885e6d63dbcbcdad5f16686b. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBRV32300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8c5e86a5b3cb1b7ce79a7b8bc168a70f6ac4c4dc9b0187277d62e5c8eaa55. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBRV32300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15192ba198f8d2998f8dcf7a91e26ec21afb401b647eb3247806d7e34eceff. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBRV32300021.