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 0x6c28116a4677ccacdad6ec59429123e6534602803fc1257f4b80fd158c7e6879. 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/2826dcd0-a599-466b-a12c-821b187c68f0.json and https://artists.proofprofile.net/proofs/artist/2826dcd0-a599-466b-a12c-821b187c68f0.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 0xa66a6d847d2306102e64204d1922dc0baecb71f7f2e2aa79870a36aad257ea9b. 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/FIMRR1400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dcc41bdf35b0b841e6459b0d08305c102be366bbe5213ec30a0e90852ed453. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FIMRR1400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a660ab94965fdf8f7857691e643acbc3a2455c4c9b284fdbab70e14b0ede6bf. 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/FIMRR1400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b7da992a8b09333b7526bb543f3517762caa08904c7e8a69ee50b2b2d6efe. 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/FIMRR1400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406396f0013c76b4b42f7184275193bfd4d252b0fd162bbcdab58ce743175a2c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIMRR1400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522d4f2c5772a86b57e9d2e6f405e8b0d6174f9c9beaa47de4cdc7c7c9653398. 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/FIMRR1400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb94b04a01c72a63b2c4f029a0711ce57743dd1f3e27f6b5a5970b1d41bf0a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FIMRR1400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3780e19e82d5b3b9c5387deeec2efac8b865a30942c7e0488b8816df75e8a. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FIMRR1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b2907990241ada7f9fd7fb8a6cf178d64a457366cbe8703ccc41bd044de2c. 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/FIMRR1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070792af53dea49bad3c3abfab7c2b95b802baa73b496480a7d5509f3510ebe4. 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/FIMRR1600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c2a1cf2d0d87dc04acf717471ff839a6d60c10eae8b456a945ebf73f89472. 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/FIMRR1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a93401f5d6abbfbfadfbe607cde3ef4efc5b80d6c5d3d0e099ca011b03c2256. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FIMRR1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d546074c9bc45835ff8e6c92f730c839b2835c427dcd67c2a82eccc5f30934c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FIMRR1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e88cd325841d075bff27696dd38e289abf9887525cedbff9762e5e3954f90. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FIMRR1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fae46d1f8d42515ee5369836d2a15ff171e1d9940bf8bbb02c1bdb2c7525b8a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FIAXT1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71b08045a588228a7017dc86281a6b74e96653c67955fb42e4c34f367b1bf02. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FIAXT1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a891a120312c8d232110a756d18f2e3f0e2b08890dcc36d66cecafc5fd217e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FIAXT1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f81b3efb0c0c62edd4b913116001a0cf5e4b473db43078e1db97e235911a4fb. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FIAXT1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213a1e719090eb02ef22754ca15e68d21a6e10110a00811efa1b3d1296a0c02. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/FIAXT1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b311517cc4d071b438091741cd5a54f2bb7c5c8669a6fdc231f764a3e5dd51. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FIAXT1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126301af66cf5b6f82d36e5a59ad0980ffa44dfb01f54edb26fb4bd06261ff1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FIAXT2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b4e85627ae185da95a50d5c41bce2bfefa0a2b0598b663b9cb99156b7b9b3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FIAXT2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ac348d991f7fee0ec8851df78e5bf9dc3cae4bff041b839879ad2ab639c39. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/FIAXT2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd019e516f1d2a04c56cf778e417874e2a5b35b214ec8743a795a81b82904356b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FIAXT2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6c4df1af3cd98a23f25c44c6fed36b161be5b5549302268f57befa84b0329. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIAXT2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d4170256ebbd55efa6bb3e29b58cd0fc65358f1a9a6edf07268f1373e80ce7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FIAXT2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096e81191fdd8ed3974bd8e7050a6d2eae67622a78d716f67a57617e12dc312. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FIAXT2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376422c6470437fe10b0b6232d172f026b30a6ff49c97b0a687102c09dcca24. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FIAXT2400010.