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 0x2b2feff8883b2e96906cd6f3b83380b983a82446a8dd8ffe0ff7db91b87f16f1. 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/a839f28b-dc7c-42e6-8231-58e1dc7ae448.json and https://artists.proofprofile.net/proofs/artist/a839f28b-dc7c-42e6-8231-58e1dc7ae448.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 0x8bbe95e82e48db7c17337b13e8b37cf1f9c55d2c48e9b4168693b6c03e496028. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/USA2P1406352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880955573c5800b3aedeea48aefdd3cdfe3682b8889203bffec6ecbeb00d0812. 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/USA2P1406355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d2bdab9a60c1576306e7f7928d636125b649964d519e3143fd5906c5c5c91. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ZAC031800244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf0ceb0052fb150f785b4db16fcecf31433d1917bb6e81fb46c6a9c15deff71. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USA2P1323593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe731b8ddd77ea1e96bd29ae22c275281e8dd49a4a9a80407289ee2f48520f0d8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P1323594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0becaaed2036fdd11f5bd2e4fbf477f6476d08ace86a873da35263f9f1e26f7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USA2P1406360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d01cea05820e217ca3e14a18f7085e0b90a7c9fab4f99e90abaeedf6f30869. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USA2P1406363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c0eaf7fe0944586a30ec01e75a434c0732fa0b642cc3ae5f1df7db38fd25e. 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/USA2P1406350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e076d02f790a1e68f4e82eb1b32e7b0c10f70992f48e68c1ff26e1c97d37d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P1406358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab086d876ca29392afbf7a9e2b2119f56a16f95591cd0633095f275c0156552. 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/USA2P1406356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a1bc6bb46a02fa5f00b3ae1d8d0a1eae1af0045cd09a98f2a5ed05dea38f6e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:28:26Z), 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/USA2P1323582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3eb0926eb4efe5bf3cf4018a2caef9fc9978be2aefc7dc0473c9504765dc87. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:43Z), 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/USA2P1440486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb17b1cb109fbb077246c7970d3c4e36d7f914032a9d39fecc0b01dbd79d8e7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:42:15Z), 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/USA2P1440487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef8986aecf3d26039b9c9fb3bd508f6e305cc49f053274038bf6a77b0538d5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA2P1440492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c1793296fb082b043d5a4cf549a3a954f7f774ed8428d29e9b0fe47b881621. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2P1440496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c1793296fb082b043d5a4cf549a3a954f7f774ed8428d29e9b0fe47b881621. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:52Z), 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/USA2P1440496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04c2c68e6dab1a11f236c77b48f1a172126c48e1f83d3823c2e1027ba94097e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USA2P1440499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31b20c042e71de588ffb4cd2a9063d57dc890d2f12f276c036d351d333a5b1f. 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/USA561406012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e47c14831391f4a999798f150ce02fda595ed1135b37ff1a5e9966107364e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA561406013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf1ab9876dad17b77d3f277ed09b64f75d61d14b47309d767b2fa1f6df0569b. 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/USA561406014.