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 0x76e401b3cf9c8fd42d7f8fb6f80901a655853a6afbefca7a56d639fe12de43dd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa3e379-acf3-4199-9eac-fd6a2474c456.json and https://artists.proofprofile.net/proofs/artist/eaa3e379-acf3-4199-9eac-fd6a2474c456.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 0xf3fb0ac98f4d3f16b2f5dc9585a550d16de386195af8174211fa63fed57872c4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAFG2078691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc33ea8ac2139973b80ccf173509459caf2fd38e63a7b8bb3882de7b9f95a9f. 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/TCAFH2068671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453a48f08248e31ac81b521f8c78e654abf0f7d512c4d5c6ab7bfc70b1cadc47. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAFJ2186486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a445c60cdb855e4888f7e847a84bc921b0880568f53504e5f3bba3d24f649f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:59Z), 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/TCAFK2102384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cc024954ed213a86b9446bdadaa9df81abbc5466281f611515c36039de6670. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:35:14Z), 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/TCAFL2119713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba962c6e973d5f07fda95502b9796bfa9513c0b0b8c6b284a297160ce299b65b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:52:52Z), 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/TCAFL2163042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fceaf2c68d107bf9e2923327db216149f4bb486ab756bfca090440e55ef7ed4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFP2113014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33038a00c3a1d17765a6b2fa1e4adf9cc3f75f87a25dd8e1c704e4691615903. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/TCAFR2192934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae99236cb4a1cd143505cd2a327630a8e05c3bd6fa1c26502740bbd46ee5ec81. 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/TCAFW2159144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1359dd1270e94baf7c2fca8ef44dd11c800b08c8082c68fbc89059f8ff748172. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEZC62250605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d205a584f7a18e8208afd0be8951e10aaa2e166bf2504a4545507e72eaced. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZC62207607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923843d50c0888dda8b83295bb5d5cc75035e9bd00e46f998e84902dd7c1ebf5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:11Z), 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/DEZC62361855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c7acf2414a94cf3bc07e84ee863d3f3dc68d602add1f270c03223561a554d. 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/DEZC62497674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a64ccba9869c440359e5827167f2dab2c223e3014acd1256aec89b8e01931e6. 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/DEZC62416841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea05f20447c6325700977c32cb62d8826608eb09bc4c6a56fa3b966ef08f0d52. 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/CH7812418793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b38fc8813040308752ab85971d0e7c760785410db2a31fd591b5f35b5574a8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEZC62402160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459c2e53e511ba666a696a3257f88ff9cd8bc4fd40b8e928c5aeaabf38160ee. 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/DEZC62464933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b38fc8813040308752ab85971d0e7c760785410db2a31fd591b5f35b5574a8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:51Z), 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/DEZC62402160.