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 0xb25913db3dbd8e20d2d5ad79a25fd965dcf820b9f6fa699fbdd74032e23dd928. 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/c1232386-cbfd-429f-961a-1778fcc259a1.json and https://artists.proofprofile.net/proofs/artist/c1232386-cbfd-429f-961a-1778fcc259a1.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 0xbad573820f8c68e8c7af05034af89ebf27374d89d935aa897be9740e90a715d5. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCADN1889454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243e447567a6b2cab610a9991e92fe290ab6ab1bb377843f6a30dbf216a23b6. 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/TCAEF1961816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742f95ebce5d47ca95b88f52ea7610eecf234cca659d550152eddc4457cde221. 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/TCADY1867849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad461010414e08a062babe2c31ec75831d7507b70d78ab564ce6aa7f84e0a6c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCADY1867878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac713a55ff531c8592fa57a7af59ad649cfec715ed496ac63557e363b2d9c860. 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/TCAEE1941649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd549c75f974379f443679552133e0d37590ec2635e401be647f719ae0108ec79. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAEP1911046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207fd80d3ced02255a79f07684fa07a016a6ff2463fc9b7f012320c0fb8de95e. 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/TCAFB2048038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233ba316d9c10c172fae09cc1937ff6b9cb54d42cd053e6b51196ca0e6b4477. 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/QMFME2135022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d607d37b4cb3bc8ac6de9b51f5417313965a96937f6dd185be15e8d483ce4fb. 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/QMFME2164174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fe68c0ff5da45ab6b82182293b234e416392fdbc0424ba89b44f27bd5bee5d. 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/QMFMF2104479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec39b58a94a8e7680e1831edd5624934e0acbe0a18a99e129b222e3a71e2c8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62121859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a989d3693b0ff386702885527413da150266686ae34a0ca81ca7eab41142c43. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMDA72144768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72a5d8b69befa4141e6caf2143a3fa6ae08a26c1373a50e9de207dfaedb33f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM4TW2241884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118840e1b6f321413f62ec08445d9c4c757d5eae6b7e840157576e19c4a01cf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES65E2200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09508ef0eb8290a97721104529033e3b298864c62f338fefee2ace35ade7f31. 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/QZW9L2217275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bdd2c362b618231540b4a43098f98ea1bdda0c48a8d7c985b4032669012d7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMZ92309326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d38889ffed93c2a3fe25842406560ddb454c2953fdad1b6a00e00e6f7514c. 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/QZNJV2375083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa8b0e23594414cf63f7dbb434a1a7e57b7d275acf7aed0cc06ba1c50c5606. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNJW2300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89371fcd8ffeb666587485bfc66203033bee5dadb290e5310ad97c54462f71. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJW2363493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e8a5f27961bbad03870f844142bd27a1915dac0e938c59e448af4289a6e0e. 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/ES64E2310902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4623f906f7ae87e3cfbce712d7dbaf8d333a086559d070b73be41047de0989b8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:18Z), 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/QZNJY2357004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66a95825cfe2d7b3e31ad5f226d9613bff8223825a439cdff11bb42c0d3227. 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/ES64E2311942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc40963e54f283ab30f0c41e06aa8c45bedb3ee215ace1d4898d005dae00108. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ES64E2323038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb64e99600de9c4f903d9908190639eaf8c798dfc993ab149af4c1f25587a1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:09Z), 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/US7VG2425784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd12e1a7a3d3a3b5da4e9ea348c2feaf5f8f455c80ffdc865e2c3110bcd78107. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US7VG2494217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7cf65701d7a9f0372bd677229d97e4cd1013525eef5962e590e1a11604d06e. 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/QZGLM2456244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2be4c60af4cba62532058ad51cf48b809c813343ada2272d2f21f3c38b1b1e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2402104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98f11a55d358a37540577095c79557e8e0fa308df2d44be311856804f1fbbf. 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/QZNJX2484024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008f41a50e024acbea6febe308faa9e16736aa3ed774fcd021027415a38ec076. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:27Z), 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/QZNJV2543879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65496897e41661c7eb88e669448966f4fb85556fc220470fc6a5799168f47c0. 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/ESUM72302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46568c248d2bd1db735991eba8e19812bce79e07f66af927db2c20c48739e620. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES64E2323545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b275c30f798578fdd2b42d2d175da32f2bfbb5330cb9205990e7ada0def049. 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/ES64E2450070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5bfcc25b7e57ba939e9986d8ac7ff3821d92ade00eab9518148c2b77400020. 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/ES6172020039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c841de270499a49769258cd9863e1c87b0c10fe26650ae293a5df8a4e00e631. 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/BK4DA2452618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8f4e0e824ae4ce53fcc7730cdb8e0ddf596a1a8b95efb6c716a78424d1808. 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/ES64E2201796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff1139aa6d7e7e25912bfb8b8494ea207e68863074fe94408ea26fc2a5ea8ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22192782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac68a8d0ac7f3f03c461b2322ddf7e6020be50dd30bd0f81a5333973143e2c. 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/ES64E2508911.