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 0x6a78d33ab1b9afb899ef6afa8db11a18d55fa24f2131e43e67ee22231b49343d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c46910b6-75bf-4790-9584-ac5a5c00cd5a.json and https://artists.proofprofile.net/proofs/artist/c46910b6-75bf-4790-9584-ac5a5c00cd5a.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 0xc15a592605af574399f2ab6ca2a875f11f45af9f5e68948e30256fe8746abbfc. 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/QZWFK2403099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6735068bb84a58eb9b99de37eb20253d9cc13306e999b5e6d4990eb8df8f836. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB52449318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552f33b6435a2324970d0dd024bf4839b7861047a43e23130b35d1ca41bd6dc. 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/QZWFK2403100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e537ad35c7436c3713fd2c1ad1d898bd9be3442fc2b6c2e84ae4da29ba13de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFK2403101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c937a54c2159508d365e4bb7f515a9ebdc871d25cf4aae316707266bf5a8fb2. 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/QZWFK2403107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c54adbb9fcd86b0c14b8cd897f9aa764b538d19d03f5b1ba9d4d2f29495f4b1. 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/QZWFK2403109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42545488bbe72bc8d931930d3ccd34462a06ed4d0113973c4b0083fcaa8a6db0. 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/QZTBF2427584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e231990be6f9f1d2633f321ceae62099b0cfe8d4d0e2b92d307abaadd2b7c. 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/QZWFK2403114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35d46ab34d5d0ee1defec642a0abb873322ad06da1d857ff819e0566b59de8f. 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/QZWFK2403117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafabb0827ee7892e3a4538942aeb96a640a15fcaeb2890e7b28d72fbb2d4a20. 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/QZTBF2449706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392a762e424f68e066c604389baf14560a24c248ff86ad0d69be75db3b0efd7e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZWFK2403103.
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 0x73d9b012775b0b71a9b02f48cf96403aecf3f77802a876d3b6424ad9fed16eb3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZHN62562446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b60edaeb4878d6531e98b84ecf3f4c4e318264a1e11b2dd87bca8df213abc. 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/AEA3A2317469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6bc92cb9e6e3125f090bdfd207d6f105e8aaa11ee9af4df866f29acbab474. 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/AEA3A2356612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4660dfbdb6c56b1264454f19d4c45436dbfc2fb8d5a472c25945c39ffa3b2. 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/AEA3A2370744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af4558f38cd5b20842715289d0aabd2c811ccff2f9fbe4e4bc8c96afe6bf5a9. 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/QZZ7V2437204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea8ae43bd66e5d72224531a51e5e02ddbbc678ac1b909e363f1f7489a52b4d0. 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/QZZ7V2437206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08171ab2459f556c79a1539d6ec92674cf6d7345c1a95f480ae5082fea2e3ded. 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/QZZ7V2437207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f302aa52f6042edc49a7f7f22a76b4ce76efd8efdd77bf3871e8d602cafab0a. 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/QZZ7V2437209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a78b406ae9d63b4e7170d5f5442210e4be114bc8ab955d0689aae53ea48a484. 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/QZWFJ2424661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586532cdd13b483dd0ab144429ad834e6b4d1eceb9ed6297aa86705e1319dae. 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/QZWFJ2424663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce24f7165a089a285c08b8bad7042d426e5d32ab34fecd7e9c991ebdb763a413. 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/QZDA52316905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857c3b62a13e214084b6a9b4b0ddaaa9983184c0f42c4fe4dbaea17631dd66d. 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/QZES52399132.