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 0xcc6d80fb9ff1c60db88cfb4de8efbca2213689dafde6eae874ecaf89b8a96c86. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96cb497d-2ee1-4e18-8b3f-d61265726b74.json and https://artists.proofprofile.net/proofs/artist/96cb497d-2ee1-4e18-8b3f-d61265726b74.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 0x6c41f43dfddfcda592ab3220993d528fac1d19bbfa97f8f2396ff4f28090aa0f. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USES20300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b03b797b90182166ebdadfe03bb46b8647c1ba1e70fc8a3ed0b15836e46093. 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/USES20300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5aa4ee26b76149b61095b759c67e46a0eb7d742bcbbd6757e44da15e2a5521. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USES20300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010e26a333a3295b72698d228193dec35479682e7124f136441714ab053a6b2. 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/USES20300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3368c5fa4038effc41273d803e4e236ff65c2999e050509b84dddee6342e8920. 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/USES20300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb06b4c9461d4a6a296272b498d489bc3fd4e8cdc2f2f55a65e75f58bbb8d30. 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/USES20300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebe70c3d9d869e5f52db243787d457c44948a0a0c666b3394913a9391ecd9ed. 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/USES20300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23386607b545c117e18daf9d3d04e6412925d8f016fc5fb3074c1d955ff8503. 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/USES20300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcadecc6b511a7a3f38772f8b366acf43d010030ec355bc5ac2154024beb53a. 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/USES20300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f64c7b3dbcc6c3dcd6037b30b412f00e027f8d3c6f3916a5a590b08bcab65bf. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USES20300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0daaacc43eb80db6038dd5d3101c19fd21dc447aacf154339493120dca69eb. 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/USES20300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e66d32f526944aad371c76c19d9811e2bd66e9b13be1c437c8d405e82937198. 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/USES20300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9708e5e6fe6a176aedf19140c6eef3d5f7ddce6d14760fa8f635d3cae54b5b. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USES20300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0385784b1a13959b0fbfc808ac29da50e4d7cde8057452b2b395cec275e335. 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/USES20300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6840e7092e85f3bcbce7af39542f00988295b258e73dcecb8c73396e806c40. 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/USES20400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3368c5fa4038effc41273d803e4e236ff65c2999e050509b84dddee6342e8920. 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/USES20300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5aa4ee26b76149b61095b759c67e46a0eb7d742bcbbd6757e44da15e2a5521. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USES20300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45602a82a7b5a768e806f91375982b94267977bcb7c84e8dcc4c7a44f91f0cd. 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/USES20100074.
Were You There When The Sun Refused To Shine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6294016c149daaa637fcb1e97186e2868d45751e883eb9338e58911f830028b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USES20400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090913bb466e180f0aba905296a6457c13a6c5e036fec798f3e5ef4e5ad1c123. 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/USES20400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235616d72c7e56633d5398e6f8ac468a0094017d0f14910de7fca919eadd7a2a. 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/USES20400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010e26a333a3295b72698d228193dec35479682e7124f136441714ab053a6b2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USES20300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e8837d8301e2b803cd1fb5dbdb120c0fac692e444349530253ea5670e99467. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USES20400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff5b4504cf8c8a03ad82c3647f83cddd0f862fad60b49ae4fd05b60ddf632b. 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/USES20400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5cd511cb89693a01cd6c35101a2ec60570a670f359bc4f2a96afe7924c339. 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/USES20100080.
Were You There When They Crucified My Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f090af6e4003014e44b27a06b9ba0fbde1f3e769050ee6fcffddc3410a9f96. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USES20400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425385fce8241758596b31f59cd8b37a76e2e24f98b38413114547f14c64aaef. 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/USA5W0401830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d43b67b5d7b3582771a7c61510deeb9a0008d7de4bee66be85a8d7e29a7756. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USWR60200334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cd120d8baad64740de5f79d6867a2f68e606017516aa24a54c15c089a215e. 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/USWR60200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e022a4421a2939860a8360eaeb0027ccb428bfc060cf947e40039ee998247de. 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/USWR60200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2511b48c7070a06433ac72830de515b5d932de2f4a0e2bc623c5f3a119ccb435. 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/USWR60200344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7965a34bbc46fb300e52e82be2215d756c4305d3866201fbf00ec1dd00756b4. 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/USWR60200346.