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 0xe79760a78342a5f203bf8e407fa30bc6443f182024e1dcef694ff27bd0ed4b6a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5221dc39-0a88-4621-9b96-f88ca0c69619.json and https://artists.proofprofile.net/proofs/artist/5221dc39-0a88-4621-9b96-f88ca0c69619.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 0xab4f93d6b8bbef63b20ed4d354a688ebdd32c102f825cba7b23a014472fa7d0f. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/GB6ZW1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ad4809c1dd53beff55f947cd3ccc6d8fa346a9acfef0037284d98421994f0. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:45:55Z), 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/GB6ZW1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d8e9cd1f578f3f55c59697e0a96b7e83dec276e5e26fb85d605c3fcacd0bc8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GB6ZW1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3441e30a8d4792ac9ae33f3a3a36d25ccbe90a188e66f918bb67b715463adb1. 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/GB6ZW2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e252f1194b84d1053525f4f3d2e516cefd1cca81f6cb0b68864620e828f9959. 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/GB6ZW2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3050c37e14f3de2839c4e2fa47d5c779c256dbc5d30b65b81090fe2eaefcba. 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/GB6ZW2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d56f06de05b2544f810d45fa3d65ff1222d1d77711de3c8b29934e053f193e. 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/GB6ZW2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca093d131db43520fe554962994694c0392163236dc537b7629a17c339e5cf. 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/GB6ZW2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc492c8a2523def65e6104d76a5482d7d178352f473dc58e6d83303f7f1e28. 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/GB6ZW2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a1d0702e615198c7f6c0ecf411728037a2203c4276768ed4fc1778b189bf2c. 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/GB6ZW2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b441f1b6f4b70ff4de8b82ddb0e06cfde629ad71c0c352533758d098049832. 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/GB6ZW2200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c4ac5f8cd9d4e1f286ab6e9287e78f685dffcda930dbfa06e65ae9d6f233cf. 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/GB6ZW2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc173f002b2124d2664a8070e2b3cdb64af7c1af48bd938e240c244c4e3e936bd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GB6ZW2200097.
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 0xf88e1e9178e0bbff117d303139de56bc0f12f381b7fc549d0a34bde3918987ea. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB6ZW2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ff9e12e09ee3668a27cb941bca3abbfa3efb3372ef75774c59e52f3b555c6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GB6ZW2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ba2105595da05c751acbe1e38c8c914736e9e755b9b609f83cca3b871d3b30. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB6ZW2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa700dfcb264c23a25cbaa5f76a2f679c1579deb87c19ea6b6afc98e5850296a6. 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/GB6ZW2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6ea37beedf1e707d2ef8a89d7fedac4a51300088138699b9a4c1047ab8509a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB6ZW2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851de163129fe9a007b2b7c16ee5aeac5ff678874c31d78fbc2f51c824efc0e4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB6ZW2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2206e3aac0a6e9475225bda8c96b5dff76912d9999585a10b93cb4d65749039. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB6ZW2200094.