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 0xb260fea88d57a066b19cf30f8ad510d94049771f03699512f1d485779c437955. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/043806b0-ed4f-43f1-aaba-f5b7541c94f4.json and https://artists.proofprofile.net/proofs/artist/043806b0-ed4f-43f1-aaba-f5b7541c94f4.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 0x8ae6780552570aabd50bc3866415b25776b1a93af1a556b298545342d8b134fa. 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/FR9W12014224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cd58a200ed288a88793e534a5c0ee2bb129cb75dfcd8bb0229e4496a84feb5. 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/FR9W12014225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924de485354fde5a0e82bc29530eda3a9e3f329a9cb0e1397d093b9d09bf199d. 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/FR9W12014226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e68917e3288d8a446e056b3c79adb0e3a05624dc47116b6cd347a1b31aae3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12014227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f6517289ac38d9ac48890e23cf4f52aabdbda64c5865ba39357ffd8b75690. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12014228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c756543af8cdbcd4d25cf53b9dee46449b5276c863de4d725eae2dbb322f678. 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/FR9W12014229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf654bfebe6a74c2c8e1db1658ef33cc63e04b0a81dd8920397b6b5b8c4ef3e2e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12014230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaade3934fa9faf09937a84b4aef0e4e09735afa24fb8b25980b07e5099fda0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12014231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd571e2505cf76f9efbc6f1c404326d160ca23121e1b12199e867fc3b597ce. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W12014223.
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 0x3da9b402b3f25f72c566657f8fa64e4e7dba3a9ee9ab6cf9e31a8fefc94cacf6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12014232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62708a725200e6a9d7ac78e29f55b9d738a364ab031f8130b6c1285cacb298. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USA2P1924139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea6153c669446bf2338bb832a0ad757fa8e23d44f84dc935163722fb408457. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P1924141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21719c3397e7385c45c489afb60d467b4c11492fad157b2a1b0525b264c9c7d9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P1924142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105b2fd336001b60d460ad3889d54e955aca809ffabd7e2d9d1c87c11381d726. 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/USA2P1924143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe70f34035bcc3ba419f81e6244b1dc5c1d3cc3e98924834c871663602974b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P1924135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced50781d12abf12500b042cfd4ee174e0ad444e95e5dc6f8f69cd418ba3bf7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA2P1924136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a84a0853629a6d92effbc11bd1af136d5bf84fc8867ef764501874d369d12e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA2P1924137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97538166bdedb7e1bd5b300c6566dc9e7f4ca082b558306fd51c49d4f8f1625c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P1924138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c38c87ec52869e5d1a846f610214c50ac83803d2c6774bf09d63929e39ee68e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA2P1924140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39997d870c55ad496d2c6c9de9e0ac083cbb20e4163fbd9ee7ce3933fd0f2a7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USA2P1924144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c39125b6f7fa505215e3749d219d61e0e3cfcd3668bf7e118360b197c4c694. 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/USA2P1924147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803c6b6cc58bc72fb5e679f8cbb5b7e04ed953dc5fc5fdaa6294632a1e9a99a3. 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/QM6N21428401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969110801303b08c1b07644558d6966e2891d3197d1b6be36474a09ec9e08e88. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6N21428402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ffbe415d31408e97efa10c0135d522cc56da0c14143ad31d2b7ca5793980e. 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/QM6N21428406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f1361b2c359bd4515c829a1e593306c569403ce82823066c80bafe1e21fe58. 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/QM6N21428408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7d8f1f46c8caf427d513f8d85c53d9f9a768a4f8da0490e5058e1d268201a7. 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/QM6N21428399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb191aaff8023dd5efdf9583eef8628603e2d7d0d7c6d2c05f9cc8860e6623100. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM6N21428403.