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 0x2e26308db2240bdd84638eefefd583c4b1d9c36a07db693a14208aa14740ceab. 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/972e971f-3a86-4e86-a699-d84bfe84adf0.json and https://artists.proofprofile.net/proofs/artist/972e971f-3a86-4e86-a699-d84bfe84adf0.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 0x31e5625e8ef30216d4240ae97852a23d4303c4875fcb6e5f5985b5ba21c0e4d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USZXT2351299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d2e5050da66ece61b53c593cf7841f54e6fb0c3c73dc46bee364449c59f25f. 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/FR9W12364673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8767562bb4f3aab3876f93d5fe6739a951fa12782fdb3cbbd97e633aabc00. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:19Z), 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/FR9W12432595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f94f5ff768e9ad4c6365a7e4e5a29bfcedb42b3ebea73ee5f57540ff19ffbf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12432597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01a950d6a61d2da97b1258872755809d53eca04ea512f273ed578043a2cd14. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12432600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c802aefbab0f0233475209df1723804ae6d138b4f59af4d7af97b1abcb34e9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12423684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8767562bb4f3aab3876f93d5fe6739a951fa12782fdb3cbbd97e633aabc00. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR9W12432595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c802aefbab0f0233475209df1723804ae6d138b4f59af4d7af97b1abcb34e9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12423684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d343d5a4e8ef5751edc8c139d6af2cc3514c7b626caece3fcea3009edc0bf3c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12432596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6bddf24233a94ebaad5a160a22c318c661a8962aa2b7286263e19af051382. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12432601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4658d68997179f247c32dcbe2fd1a7d5792fe3e31313e0458aad4e434e8c6513. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR9W12364668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4495fac0133472955e02c72e45390fd4dd3d4f0fd7b7bea788a1c3cd0eeb90fd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR9W12364669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03214f90c50f74c5b6211533cee508bfcbb638de8101d635c7a3e111ea3b2bea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR9W12364670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576419c91d4f991b7ab3961e6dd95b86f24e0ccdd1c6c387d110049cd90924b7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR9W12364671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50c816cb713fd1d4e81e24b21d91799a29bb3e1e120bc205892132e9de3194. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:58Z), 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/FR9W12364672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d2e5050da66ece61b53c593cf7841f54e6fb0c3c73dc46bee364449c59f25f. 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/FR9W12364673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d53b3e53763cb1e1f6c69a001e54f4f7d27d019de8d69c1985235f05fc6981. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:51:38Z), 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/FR9W12364674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d983bb87495aeabb489ad35bca625beb8674a6a8034def76566b56b2155bd53. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR9W12364675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbfcf698d93bfb2f1e0a5014c82928cd7b760ee7d5879df23c9445d00fddb79. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR9W12364676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8767562bb4f3aab3876f93d5fe6739a951fa12782fdb3cbbd97e633aabc00. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR9W12432595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c802aefbab0f0233475209df1723804ae6d138b4f59af4d7af97b1abcb34e9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR9W12423684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d343d5a4e8ef5751edc8c139d6af2cc3514c7b626caece3fcea3009edc0bf3c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR9W12432596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f94f5ff768e9ad4c6365a7e4e5a29bfcedb42b3ebea73ee5f57540ff19ffbf. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FR9W12432597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb036daeaffd5b9fcaa8ab41825015a872a83530dd41e4b56cea011cd3fbf1d73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12432598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373bd4febfc301564c81eb1f2d045fe60802b1bfe884b11e3ebe0bb8a021859b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR9W12432599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01a950d6a61d2da97b1258872755809d53eca04ea512f273ed578043a2cd14. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR9W12432600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6bddf24233a94ebaad5a160a22c318c661a8962aa2b7286263e19af051382. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR9W12432601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba511fd3d4f85127b1447c7a4f2b290129570914ae99ecb97eac32a3a1a01e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12454269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a986c2b8e2fada931532c43efddea3b7e0fa54b9d3fa6beae55b4d86920d11. 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/FR9W12523804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b01bd9ab536ac32c96ff1d976f680fc0011f2d18c10bb51e8a994387245fc. 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/TCAJQ2559398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91b68b9c684a70ca3fc807e5f128a6651b3d4f2a4626da14a0bd8fac075cd5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12304184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188d5e668f56306fb5e6a5a3c958080851ba27b297eb5e82edea90483261156. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12362218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f03340294c400c746489181afec900d8c9f9863656260a251ecc004bbe276fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12418034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd41391f1bb03b44d34196a9071f543405ea275f6ba9976f5a2fe53043474e94. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRPZ92224760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906011172bf98205b6eb3978de4440e1db69b70f8cfe6bd1a2cf9592d66573e0. 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/FRPZ92406710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91b68b9c684a70ca3fc807e5f128a6651b3d4f2a4626da14a0bd8fac075cd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12304184.