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 0x0cf0127482079cab614048110e70e788da589b22cb490321e86676c479de85ae. 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/a6134158-0466-4793-be05-0ea11eef6059.json and https://artists.proofprofile.net/proofs/artist/a6134158-0466-4793-be05-0ea11eef6059.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 0xa49a5c6466c61f905a1a73cba13d0b64da3e8e0ab3049d831e048b19c2c032ce. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR79W1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f3e8d4737d10f34fbd08262a23c4a69f8b283f0323b1418bf37ac96840a31. 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/FR79W1600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ac93de715b18974484ee9dced2204bb1453a2b20228f1c8593099cab74faec. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR79W1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb106ae9d2cb965423f3ccf8e564dadf8c3b0ae99b467a0e583cb96f95a1a530c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR79W1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cfdd12c699cfc60dd4422cdf11b259fc1c5ed373a663cf108ce42478ea7382. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BECJ72000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2e8ad16b0dddbf9e6b838a6fe3b47a7bdfa153b6e0a05c9e19252696c761b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BECJ72000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29aa7da182223fbf0727f5efd1e638d8cd3dc29c4366b95740fd4b0ca56c86b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BECJ72000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92786fb47937444902d52e056ce2412aa65d33dbce9c12208d488622285540da. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BECJ72100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260b298953d04cc04700c404ec6a38f7f416f3bfb884b481f4e3cc886737783. 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/BECJ72100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ffdf0e891212b7122e75b9cf0cb468ed91939bbb5cf8d368ffa4e07f9acb8. 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/BECJ72100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184efb8e2b0246497af4be6c0c8276152651ae32f96232298cf0ed468b07b821. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BECJ72100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7803baa78fea6e8ce6fccd5b94f7a61494288079cfaf28a84f6b37413f5f1e9e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BECJ72100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa680152bfc0208d64d7ae1c10000f9cbe0601bdb92e93add6ea75ea22b4238e9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BECJ72100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856439357ec2626730041a43e7fc69baa3f14441f8b9ae39f9f35d7189db1ddc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BECJ72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c3d00929fd8d741be562f3ec74fb4b5cbc218117794748d894d06ebb50df2. 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/FRDHM2400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c0c9f3bfbadb285ce0ed2eb7592a33430662d17754262e530f89a30abf99f1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRDHM2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8e7b2a963f2e0e3df7c75c3243b003b2dc382ddfa999315e5b00504ee57aca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRDHM2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d2010d546081b80f9ce39bfc11e317b9a6b1bc9c9bf321e8293649f711004. 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/FRDHM2400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ce3e582b7f802693be028d142b53bceb05a0436229aa5bd44922a813525b87. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRDHM2400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856439357ec2626730041a43e7fc69baa3f14441f8b9ae39f9f35d7189db1ddc. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/BECJ72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f93d28852d43e76c8a6aad6945cf6b469b28ff63582d47d1a7a78420e923c71. 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/FRDHM2400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6e6fd8a30657904023576df9454451962060a1bbf310425d896eebf3a830ad. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/FRDHM2400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7b57dfa7d65d285c65404beac18f329e0200d471d439980dba43741372f235. 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/FRDHM2400160.