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 0x8ad83d295e88b30263a9546e487711b7b471b7e890a512c732384dec9cd8a053. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bbaeb8b-9620-43ef-ae98-d2033bb9feae.json and https://artists.proofprofile.net/proofs/artist/6bbaeb8b-9620-43ef-ae98-d2033bb9feae.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 0x3ccd3f1c60a1d01bd28f62e9a3b629410cbc11fb54896278aae2a5a2d222c1ba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB2440664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001e51b06873109d4a6197a12680b8f478e0c3d4d7faa324590d9b9a94997172. 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/QZ5AB2440666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f071e0dfad3c56d1569be7076a9233803e976902576a3773c6a87e4c395a9d. 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/QZ5AB2440670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6576c890bf0ce78bf9e9db9dfdc5e27691785dca16b00d7d58da3f15b3548fa0. 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/QZ5AB2440672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a9c81147f19cde131d1f597369fd276b9da70da50903e977347b522bc01db1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB2440673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdae5468445b8f219089a6bc5ca7d0e2062dca149417c61be471da96429a82d. 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/QZ5AB2440674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a23728dcae6ad79f745eb0cc2d5fd1c7150354142ed63fe6bb2c5770c97e53. 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/SE6XY2332230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8121d487d927ce24b7becfe12b670ac04c721f36b92f6612cf3189e4105cb8c3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6XY2311799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36a6c419397b3b6132c1541d904a36ad5ea296c0881c1e1847a2ac8fcd27fb. 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/SE6XW2364969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4f2a9b21b0d38fb6ac822cb81b6f45b73d5cd4aa1ab32b7378adf0c6396eb2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6XW2271177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ddd92e77f6a704a91d86949a2b168ec72599571ca505def0077a6a7ebe81b6. 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/SE6SA2313689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781c263575894d7f31e65ef47fcd8e5a990835209e5768b913f8b8ac4e8d2921. 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/SE6TI2340822.
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 0x0e48f281053270ffd6931f7bd086b9ac7407600e2d1a6004773d29f750303d10. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHN62431139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a539b9320e5e6580107707cc55f9c0b1db32058a25fa5e385b96f6cae2a98fc. 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/QZTAY2375050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df70214334f53a96f188be4a357f069f8fb5edec80d31c8d7d268b8ccc5791. 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/QZK6G2310757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13436a1c003a7928ac5da5eec90cc627fa2e9c84576523b3662b7217075cedb1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2415352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6cc8c351b842ee720beb9e7b9265fe7f51ca2f9fe4323ee165f2b739984c47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBE2415353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5921c87f68306d9892da5912c8a0b7e8b0d0bb001230a75a5356afba055ce68. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFF2492354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324222872a361a76d2e7c4780f0e4d30264b06706853d3fae476b3097b1c6c26. 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/QZWFF2492356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb5fa1768fbaf92e99fd8ffbde62cf2b7b2201b98b3f5e6f3ab669333ac76e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2492357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7078c16955db2796aeea0139ea9db649c70276ff727b0927fc4a5d853a1ef994. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2492358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c2ba1b633e1ad04dbdfc87b3841cd05d8e56396c3f5afe84a80f98fcb9f253. 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/QZWFF2489339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e384d2085f100d034d4f6d21555b859a258deb8fc6532fcafda6285f8aa46f1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFF2492359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d584b59457a0817bed13bf94eca610cda0e4d2aa9a613a3d5f733ff59616911. 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/QZWFF2492360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be609a5f3c9dc8a50c3d0822070192c4c16f3c63e505d3dc35082565ad33c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2492361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4afebd4140f1894c1c129b06be51cc4c436293253e107c71e12a1aed0ea80d7. 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/QZWFF2492362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824081113a3c45c6b43b1092fcce974f70ec923c08c19c1512a3f97e65a3494. 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/QZWFF2492363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3641fb87b724cc1e2ec5d0d659c3f28a4f67df8875bb507f9e362ef497037c97. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZWFF2492364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694933244c4451040acb3031c4b5dd668265538363ff4b64ef3184ce065d30e7. 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/SE5BU2526114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506a60ec33aa05266848642d21959e2c9951470550097abf71927819b317909. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5BU2526115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720758965908392cc9d1a18b3a33ec226b4eb03dddf65e96ade81159644a2362. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/SE6I32469936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ce48d1ca639d849d59ab72507dd9d4d2f41739fed203f50af61b24c4dba6d. 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/SE5BU2526116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f153ca521b0eee8aab1db291a28bdf028ceeda7fff8026e35418fe536c6cda. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6HN2474264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247efa570b7217e2d14e3ee3d69dd5ad19b42582f20017cee33b5c24e500d2fe. 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/SE5BU2526117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7010b4b867380097cdd74fbf8ad3e65c2ea8270f283ff83ce332303ca76e8a. 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/SE5BU2526118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e625de76273b189b0e0cf8f283d1b36d7ce64e8b521b3ae0a62045e53b56bb3. 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/SE5BU2526119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0768b9a58b0b3e7186c8430cda281c0246d844ca8c2424ea40497c8b4c6d4ee. 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/SE5BU2526120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a069c41ea0d6976d5af20aa0f5b20f95b0e7bcee5e7a2dcc9b6238b1073e7b7. 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/SE5BU2526122.