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 0x419d04dc4fcd2029ba3a35d987fc95ad3de4c6dc61f6b81fd64b099b38924c23. 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/f3336588-9233-49ce-bde6-ba2f7ad4c2ed.json and https://artists.proofprofile.net/proofs/artist/f3336588-9233-49ce-bde6-ba2f7ad4c2ed.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 0x77509c78ca3b68b8f6515813fb6ade8a7d28ee24a4c76937b65d8f7318309da3. 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/GBSMU4047002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a9fdd277325c5b7f7a9398e15727fcf556ddce7e311313d6f471a9fedfe080. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBSMU4047003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206ece97acddb97550820dbe4191f5ab9324b980edaa36b7546f56d0771f4db7. 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/GBSMU4047008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fcdd1818f5ea4de5c2a5b63e7e6ab9f0defa6efd267adecdf41abc895f5ab4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBSMU4047009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8acd56469ed8cf91c173147583cad852444a993f241361d480a4fa42c3c88c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBSMU4045319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b025d42506e6c8882cc303c0b29c48c9236628a1875ebb9f5da3a5e0a7addd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBSMU4045321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e87fbc19a3dd572f8cf0fd722d84cdf0560010a99028a9976b4ac8b33c0b3e. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GBSMU4045324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237f11276e80a8038782062b71c38d623afdb103ddd39ccd14ea43dfae7fa76. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBSMU4046736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b53d6f0e01fae049952e85310c899d9e7f175fb9e7dea40fc33116e9b6fd548. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSMU4046737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa4940611e1b87b24ac1519f3db391eb22581156e2ba2a7ad867485c62a50a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU4046739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1cd46db17c16e252deaa7c836ea594e35810bb763fe09bed9e0a4c01e6eb90. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBSMU4046742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9a99316f384efcfbafd5ba1f384548e1c82ce4b15e03937aa66b7a5c777b1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBSMU4042037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc9c2d9946f95d4e5b5af84c46d7ea531ce67e5c98f620a7669031caba22b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU4042040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d045fe2f42464aff3ca389485a240cfa5c7b05dda875f6e035a10050e6863ca. 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/GBSMU4042041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b159d2dd334bb7c2956ce317dbdc7fada39b9cb60575429548029e597467407. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GBSMU4042048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be1529c9449982021fba57005133afe6fb98f81b62ed9377616cca5ed06d23. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSMU4042049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dfd63cd5375a6f6800a42c3f33c66d04c07a2b71e32f9cb3d6251ef2b94ed5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBSMU6465678.