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 0x79e8c07c97bb5b13dbd896af032867ada639a9f84da9ba75e415fd4e8a19e374. 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/6dcfa5b6-104a-4440-9d39-ee51a4e7e858.json and https://artists.proofprofile.net/proofs/artist/6dcfa5b6-104a-4440-9d39-ee51a4e7e858.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 0xdaa1f8d2a3905f78cb288434bbca3d7849e45f3c2e2012e69510f5de0edd5738. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BEB682000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba34a6c2a49248219ba2d53dbb0c809a13ec3aa19ada9e94089f3a57a5d0022. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:11Z), 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/BEB682000526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0984740d9171c7302f11f69db38ef2db1cbb48e8b6a66c730968495011452461. 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/BEB682200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79481ae4df4f9d4eaaa72c64025d103117debd098259c31f6b30114d0c3dca52. 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/GBKQU2268102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776f7ed1f59efeb9e1c4bbbada3e31f876f53a0c9cde52be195f041ed1d6363f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:15Z), 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/GBKQU2352812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605f234093b90d9fdac08511d9e64a73b2c9f95ed870bbeb317f24210253230. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKQU2398533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858e166582fabba3d1b705c15b34795a69ecad484ca561a2b54b78729b7d6a2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLV62320032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5275287353be40f18d0c6223cb1d50ef22c0ec185968ca9e56804c955a825e. 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/GBKQU2420269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5275287353be40f18d0c6223cb1d50ef22c0ec185968ca9e56804c955a825e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2420269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3d56893668cab786534460939ad73b1ec0195953baae583af8b5d27ac3403. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2455482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3d56893668cab786534460939ad73b1ec0195953baae583af8b5d27ac3403. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2455482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde667b849bcaf86a563858c4e8b75a376e26a6746ca1f426f7b2125da3f0c1a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:56Z), 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/GBKQU2467445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b37ac7d13dfb198372ee848e0a821c8659c2b11cc12ce23750b23f1664d25. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLV62412733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163847a80d29490a08bc3325b40bed7fef8c73bb0e16f26597b0468e2f01f1d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEB682400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeac3848b8a91de515194b8b1562d7b5f9f560a039c1000f7dfaedb165d4e188. 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/BEB682300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9a6b75c07d2edeff04a422a6d3ef5452b1559a6e90771991856fc03641cde9. 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/BEB681900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc2cda610662553f907e5311a7f69cad307092fbd2144cf3cbadd015ef1eab. 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/GBKQU2437455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b581ef490ec2551ab467fb2d31ef246c06d99dc5952e6149a4d09bf9254e364. 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/BEB682200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1456ccfdd56556c91abd95159d73baf6d0788e4b097e96e7d133f5fc280a6e. 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/GBLV62418788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09dbecdfe0a1daed8e9789108ddd1fd1c2b0a3ead5ed0cf57f912b65ef7bc09. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU2209754.
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 0xeb3e2e9b5c69d0e3f3cdabfbfbe8d1c4a048bfaeed83ce1e5c1a1a78f6407fb1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBLV62300916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53648fcabab48baaeff590d1349bef524bf6a3185da28d507542bfed3faf3b1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU2307290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd52346df36a8dca68e25c7a5590bad00e67893826c2091f1da69f0ea915bb1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBLV62315927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535ebb068a263f0a4b07378fcbd2fdf9672122b9c1fb7079ffa19af04f659755. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLV62315940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6498785c896d8b53fd3a97ccc80e5a77c71584d47a1de5e270d5da26d4a88. 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/GBLV62209180.