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 0x9c4344352f8406ca9ed76d279e306277cb017c2f48a1193881acd0fa8e808892. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf078aaa-9afa-4b69-8b94-e403fc6b2969.json and https://artists.proofprofile.net/proofs/artist/bf078aaa-9afa-4b69-8b94-e403fc6b2969.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 0xb0c4163afc05d3e6029d298dfa102af4c7701da3ab81004b3401f9b60c2c3a2a. 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/CASE12100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddacd1dd742bab4bdc677363e03c1255cdf95577a80262dd23126a7b4a922688. 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/CASE12100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79655b77281f66e98e85afd5a87067cd81d1b71c61696335e287f78d51418d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:29Z), 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/CASE12100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd284d98132000e26bd405f489987a5d0e20c322d549505d0e2dbc6bf6900e6. 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/CASE12100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d748db17ab5d2fd4637926bd07ab82fd686f7ab95d9f8398e7146469653613c. 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/CASE12100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec03db1e640d4f61208afcccf1ca2d0e53fc3bbc096c1e9ecfc77af02964dd. 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/CASE12100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf091b7fa09655bc61e5f5c49bb3b41ee4daf4a8737eed7de04fbd3719ddfda2. 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/CASE12100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330e3c96249b837c0423abd7701673d74d3055f54fc6b9cfdb4b5a4a8083ba62. 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/CASE12100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72f57af6e0e74cba15c580727fd109a2a99000731615ea5d5002104940a959. 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/CASE12100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514d8d32124624a34bfb8e099684fec26e2fe533bc1196c1c93576fe092d823. 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/CASE12100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1ed255a3741ef8f8a4bd93ddb139e67a45210e06421b39f2813dc33b17627. 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/CASE12100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79a20c3eb37442720f46412050a33748e95298f23d6d3374649afe7359848c0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CASE12100047.
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 0xf90bd240db5c2174e8a2289bced800d867705cf4b729952a0ce2aed3311e78f4. 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/NLS6R1867043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c4e97f5c4815a5b605aba82cb08c8ea03c4a0d611da0170d73620ad6ca569. 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/NLS6R1867044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772ae9eaee948901e1172cea7bd2942f2f6b83ae037d54c16759e77f70d0cb2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLS6R1867045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c9d5736724ad555f2c7217283e8a13cce7df1067d1babf22acf3da5bc410a. 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/NLS6R1867047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7ece039f4d6c63f9e277e8429f974d3356b3528c001dfa788423543a0d1a9c. 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/NLS6R1867048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1183dba6998b95d7bb8f97ccee899cd5f472205e8bbbc3b2c53010d1f5f43c6. 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/NLS6R1867049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c77180e965a5194b8d5563731f47e202362467aae79bb85f3a48841397396c. 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/NLS6R1867051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e4c2929caa29d891b710fec93d1c4f6f1decc7be2311a4a65264de1962043. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLS6R1867042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0066f8517199c4ff2693e5a9af3637caed6074423e6f2d73c33d161f2cb432. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NLS6R1867046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da5caa21b2a6493ca398bd62ef65cbad5bb34c6a76af93c8354000f2459ebbe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLS6R1867050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f5a77444d846ba11aaf3b345ba44a8a1fa5e47ce385507ea23e8a662432e2. 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/FR9W12414620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756d7f5fd7516b4d285420f7f1614e8fd8cb2ae8297974ecff8453aebcdb7f6. 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/FR9W12309878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c385932a41c900f954827e6c08f801fa6e1049c196afb862355883cea1307. 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/FR9W12309879.