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 0x1236459175a72aa40ed7bb1c820439e4646701c2ddb33cfa9d5a36df51bda3d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af248197-f4c9-42f0-ab4d-645b78724ddc.json and https://artists.proofprofile.net/proofs/artist/af248197-f4c9-42f0-ab4d-645b78724ddc.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 0xc969e3c01fd5e0f3258a370662928c98e5d3a6764189893f1a8b3983f7a8f87b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USR2M9900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d29b0a10405e18d0f4a6af93cd0977098c7a06670524b433bd7c5e2f35c3832. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USR2M9900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2137912e4a5b6c1c353164d30767db1b936f3f32683fdd40291654b9c7abaee. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USR2M9900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e345880243ca24a322e97ee5c9f6db12f769f912cfe18b2af1e6a158b8e43c3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USR2M9900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c70e3bb8b6096d0fdff69186685f5aefbb510602dbe1fbad9cce054b3f98b5. 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/USR2M9900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8689c09b243beff0f60311b445a6bc685526694bb86323dd6929ead5dcccb94c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBBSN0501027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3843c0c009a35a2c14ef637a581906cdf251e500caf326acd6bc588f943bed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBSN0501028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb69d365f3ef5cd8c682bfab5a42e700c8a979c34c0477147c32d234059dcf3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBBSN0501032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6fdd010d8323a931165e9a2a3cadb3cdd8a1f602c30d16269de260f330324e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USR2M9900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c11f2ac6c14af9ed31a21668d791cad6c717ba04d6b75852ba35935e20fff9e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:38Z), 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/QZFYY2295681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a9506df6a16216329391be3c7b2271c18482e499698de1fc93dfbcdd6748f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBFSF0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2374aa190fda1219942551269e884d2d41ddd3a423d5ef1f5aae18bb75479ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBFSF0600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb293578772eab79ea5ab3bf463b2bd2fb1bf3ea85fa2ca8612ccc7872ecc0238. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBFSF0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789417b3b45c141fb1d117841aad9fb7af269b30f076ea0f18e2101adb6d9150. 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/GBFSF0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa495e20d7abf365a677fa979f4348e98a42be35e03dfc644b060035ad09c2d80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFSF0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675b3399392b30eff3371c2d3f199830fdc3efbf65206b19ae81756184f9bdf. 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/USR2M1600063.
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 0x5fafaea7c6ba1440fdf2367361713ced864286be542c690a6dbe39a54dbeb65f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBJDN0700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7b858df6130eed28f4d98d745170bd243084c87aa9f1be0ea02ff06ae24d3. 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/GBJDN0700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0951d4934e5c4213ecbcc53bd6c4bd42625af5c0214df486658e36c9df3957f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBFSF0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e5a527fdc6afaa3d3ef519423319f986d7f2adcbaaccb5517ba97f5ae91af. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBFSF0600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ddd8878ae6cf12e343b21cedb484a511ab32a1f1d329c5ee0d37f843bca63. 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/GBFSF0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25d699f3a4a6870e067adbed523a37495471e8b8941a595681b44b6402a4805. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBFSF0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba211e407402e8265598071b629e36541525beff59643c44ffe8c30f5248a762. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBFSF0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe3d57219f4422d4fab997b974cfe0f367bc98dc88e5131d1841ddace2240b6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBFSF0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca58fa9c1bdc453945039d9876c9a8962ec23d75fb1027fdaff621d0eeb738b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBFSF0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a31223e64ccd647677f97c6f3c173345c28fb663c4552cd4773c77335b2fa7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBFSF0600012.