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 0x2d254560c10c2f42fa98202f59370c610d4a156c8ceafe83875f945b28355959. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1131fe6-6f35-4843-8ac1-26f879edeb33.json and https://artists.proofprofile.net/proofs/artist/b1131fe6-6f35-4843-8ac1-26f879edeb33.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 0x4e257ec7cd0eddf488e860dc6eac730d7aec5eca1806b83d91dfe3a611f87d69. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAENV2490254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67629ec1f31de48b4daef948f1e6fb1549cee33b9a7a9a83db507da0ee19294. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAENV2490245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058f14496cb2fc6298b8da95b3c2288c439f3cfa19c87e95fb3a154e3b82c84. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CAENV2490247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b5ca35e492f4b3f6480626ba931431914dcfccfadea87647d3649abca56e5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAENV2490249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e0646b0ccc3480f7851d1a3cef6e467c484b53829c4df9fa74bcc64a0da73. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAENV2490250.
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 0x7ce884aea9ed8a125191a0b3bfe810ee62c996a65135d64b7df8f3189fc292ad. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CAENV2490251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257b1acc6edf7961665741898b75395d1d1c65c0b0814bcbe1b665c2e004b73c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CAENV2490248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d253161c497c967b16170ff191aa50c734958ad20dce8bc38cd38e1215bc0b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CAENV2490246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca8ada24a27e8006efe03d6a3a02fb9f65fd5694a530a42e43fffd0f61b52d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTVM2284771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf260b44537c4cad038f11dcf034f70b13448588b8f1acf2fcd6b215eb02a4a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZTVM2284776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9dd452c9ac8a8d5852065ee8c561a32c3ce5ae20a8f904ef371b39ed183fa2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTVM2284778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa326f7257fb543fe457d438ad9a44a5a9a65b74c3b643c62fe002e1110e4e8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:23Z), 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/QZTVM2284773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7668e48ef40d2f2fea6844dbcc009352944c7d99c2a5acea2d43d028d1a5f0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZTVM2284772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1031d4e00743d006b40f098570bd05e6ae8f86e22dab215cd68eda670f581633. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTVM2284774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e67ee3efe2cf171dd732121983cc1c7ced3fe0ccff9ec2db2c84f402d95d6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZTVM2284775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529effe6063ca265ced166641125a5989228dc5bbcadf586623ee8391f5c9212. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTVM2284777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e280a6cf26dec88e05f06b2aa9490f9db23e0289a9538753e26c6217b72ee8f. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZTVM2284779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ade03429842b477bc15ce4a26b0765212666eabf69bd108d57d1548e47e5cec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2248051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a7e036d3e43f2849ff754f9f53ae2e988b2e3457065958bea4a73922b5fce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLM2248055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc07b9e456f48e437d60f4efa6133be7a845702926b5c94facf98551e94705. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZGLM2248049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724a63bb4b0bb23dec703f112f9c29c22395d9324eafdd0f344408e22b4ed04. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGLM2248050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3214269cae2e48f2be53797af5b87b4227ffc0020126d29fb1a9bb6283c7a0d1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZGLM2248052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039243aa4e20ec9de4267239a214258df94586fbbc5e7d953c74e632ba816ab6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZGLM2248053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924f87dea56e811de6eba052f7b8acb29c644e3e48b5418647d10d851d8abd52. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZGLM2248054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7cd75a4f53a8f8a7f625c1974098e682256c453794bd768bd59004dbab5c04. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZGLM2248056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f63eddb2b3f957ef5bae13c4879fdb0fc3bec24bbc582864dd60bb81995e912. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJX2381865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64721d02d55a23e0feea0e8c25d971e6a2ea4c7b32982b6efec1e7f14747b7c4. 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/QZNJX2381866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835a7e61545aff457699ed1f4865d0cde51250edf38bf594379bb4b438ea106a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2381867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ecb905a7a9f1d4f262739001d590afadc2f94cb6913896db5996266edd31d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2381868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21622ef934536fc40d9a62abe1a3ae790b109fb2e0945eb7ae317cddf78d39c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJX2381869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f74418001abb23a95dbaa73f847aaca46b44a3e7122fa28e2e1a859e1d5175. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92156624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb8f717d351b5692f20963f4fa0be386659e62bbf604412531b6b4bd98d26e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXIV82400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ef58b3e238676b6d6d2c7bd5d1c77c8780d4e2b264696d99227fae8bc51500. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c21dd02ce0e9d3c01618fcb3af4b927a42493c8b8a32cbcedc62c652bb35e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTPX2296949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3963f426093a6e757f3d28ec6198abaae9f6ac30a80b3036928997d829005c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXIV82336638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe665fdf70a8084303ed7f2823a1ac499ca38ca8e845e15404a3e7db414b20f4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIV82425107.