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 0x5fbe09fb990aef37ab0cd7cd98115dd389915adf48f492cb817d986199861b31. 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/262662c8-b4e5-44e6-a97d-6d34c7d4052d.json and https://artists.proofprofile.net/proofs/artist/262662c8-b4e5-44e6-a97d-6d34c7d4052d.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 0x776950073c46cb22eb927a0699a9c994211ebd8183d7a277948646430672cfd6. 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/QZHN61997991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aabfff0a287b6fc19e7ac6ecc3557cc296854e483ad129d38e8c2dc916a412. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN61997994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086904fcc2c6acfdbb992d21be0b91a5c0599998ce18a9bd171367a59e5aa3f9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN61997995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa861fa7085500452abdc4dc061c48e336f38ce98c61b8fbb351573aa82c3fd93. 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/QZHN61997996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731bb7ee60ff2f342018c6083157d9f5df406d867e178b1c93972bd7324817a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZHN61997998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cd0df9a948bfc19ce7ae913143b55ba2912690161d857c90ffb44ecca5c24f. 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/QZHN61997999.
La bestia e fratì (Corona virus session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4e3b77bc544b1f5eaca90fca223dba1c444bb023e97cdb36587612141f5921. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM82045240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d49f539254eab4f2a3dee208d909038a960f349268e58430d08bb83e6a229. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ITEMM2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abe3a98bae9796729a713366e372e17cdae752fd33b985afac41b75f820358f. 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/ITEMM2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f45c7dc570cf338a383695eca5e3f5a222312f27c09fcaff5c1113f6c296d4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH2104100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213d52fc7bd49144329a56c668f4600df48b869e39f6b9d4e51dac1f9534c51. 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/USHM22113386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b73168b2009d29649d802897a8a4b8c77376111951a78ae910200bc167d894. 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/QZWFN2451481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c35d2e790fc8c21994e84b8ca483f00c91a9d4015864439ec62ebd55af054a2. 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/QT3EZ2481808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2c638c0bbd44250930ab82b9c6c1b71e88fde573fd5758c87d2c606f5da73. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZZ772421153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b73168b2009d29649d802897a8a4b8c77376111951a78ae910200bc167d894. 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/QZWFN2451481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4ab2424693943e255694f1dc641113c15188741d46ebcf2b79ec47177e9a9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES62511793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65b031a5987a0db8d62ac3e4f74d3a4f4d1481b69e75b6ed97846d8026ae716. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES62511794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6788f76d56eeab4be845e668d0907f29b329dc32e8f10707ef2a6489ff7b07. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES62511795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e6868a6fe498a79f7e94b7f696a74f4c8d2697d3d989ab1be0796856b2874. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES62511796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38b885fe07e9f485c096b50f1490e2ba78c4a32308bbe2e6663d9aa64b86755. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:04Z), 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/QZES62511797.