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 0x9d010f592ebe03197e253a6847d3fd82772b7df82cdb0de655243f19c0dba4bc. 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/3d782ffd-9115-4005-b758-01b5eb66f016.json and https://artists.proofprofile.net/proofs/artist/3d782ffd-9115-4005-b758-01b5eb66f016.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 0x41c170590af52971d2fce030c85f2604a64a1a0945adacb88385fcdda5a5269e. 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/DEQ121430301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e6702629b6ae0ad697af0f71df8aa103fb6636fc312f4e7f5d9b67ad7865c. 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/DEQ121430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd100c9bd550a79e84f38808a660ca5f924d8f02db017da57bee6fe0b1d4ef6be. 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/DEQ121430303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69ed6b2ddd1e87cd3566df7e974fa8565ee9068de3f18cb1d8b216ae832b738. 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/DEQ121430304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127052a92d6862fdfa52cfa72933079b1574ce04a4aaf6f034a40d4d1fdb5a2a. 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/DEQ121430305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d4d340c9bf673a375500215becd0f78b2c783140375394ffbbff659f86d16e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121430306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b0b9d95f4e52698d8ca17dc532a01b370f4e35bf8d4965429f529ae597164. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121430308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993432cbe4a204c343271a39b4b165d5d9b83214edbde8e55f553f4fda6fadae. 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/DEQ121430309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392c4ecdace822689a97370051f8a427ab38941d751c1ac395a0c0d1350cf2e0. 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/DEQ121430310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb69fcc673c984c6e1e3bb0763243af1cf23f4cc2e96fad712d76d5817dbb691. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEQ121430312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444f739598474c6140947aec1939c9d86fab3dc35fa9d7433afbb4d53f3a96a8. 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/DEQ121430314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b01d3c9e51a29245ad6dadba4d865f7b1fcd4b61f38c2504c7c74208924d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DELJ81939620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9359d2f6e68978530e2125b57a0e8b2954152b059188f2cc52b90631b901837. 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/DELJ82090739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb59e0db00743e405a6262fad522451c078f139ca509b6c44f2d5f9e93fce14. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DELJ82013926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb4675562c115dde004366aa6d72d5f949b1b5b38f047f6cf46c926057b46cd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DELJ82013927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ce0ccf7beb4a42dde21951d07cc497686cc0c63b813377218c97fd087af51d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEZC62292711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9951082c13e03ed0e189cdfa9485e0bb61fd7124f8ba9685ddac5fe31da59a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/DEZC62352548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2862521cdae5d87d1523f3d4dbb522d69cb3ed8098263ab245cdc5c435471d44. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62354959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ab6fa1a77d48b6b629a335e7d030916f02ea7bc8d4652da1db08b24920940. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEZC62359763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca9e91d0667e5dd58512a81a8385040cb7e0dd78f740befe887b50675168f51. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62363727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f03020fcb4004a9cebaf953317688e96b27f25657d79e4578a0cd93616a89f. 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/QZTBA2498718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcabe7f1918e04b0a21d386a77e2b3873064012b4ec62764f660daed52a218e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121427021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f67c31fb3978e50812bdcf44a6f7618ebe58ae2499fbb74a72654e772bc608. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DELJ81337645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0d23976425f200544324bedc8242b53d80f10695d139f8e3e7cfeb4b743a36. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DELJ81337652.