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 0xad3b8afb7fe79414cfc7c0d172b7d97850ad45d825924e2109f48b999d295582. 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/294b2fd5-f99b-4722-83c5-cd3ed7d921f2.json and https://artists.proofprofile.net/proofs/artist/294b2fd5-f99b-4722-83c5-cd3ed7d921f2.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 0xe90d5bcefc4a5c35a38bb5d2413b737c2e1f5aa50570df94deed7e1a437800b0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2304958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a914e7d0279e90c26aac675e0e52487f24bfab0fdeb0bf3144c937f2c25dc18. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CA5KR2304986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3221bbfce06278050cd9c00ca46a57f9e71e03a6e1c9464939e71d0f290cdc8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2305346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3877df77ab463a9167bec14853d36cf6d12cae5bdebf944dc844f189a3b7287b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CA5KR2305347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d6e4961528a3509e70595c0d75fa56eb82d17071c69b3ef2d0bd3bf6de424. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA5KR2304960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa9ed070d8a971077d0ead1e2c8f15fa3e29df56b062e3b07c9bf7cb67d0ab. 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/NLCK41403831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fed309ae487ce7656b7a9935a68ccee3e299e5c9d74d519e9d198fe86a2fad. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBCEQ1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae679dd128e8a40d25229880b63d128cfdcf9cc5b11bb4aa1a0030b34ef56b74. 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/GBCEQ1300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2967ed1b87fc8084231b9a9d8bdf34da0068ec0f80f9361b14e3d122600fbfc. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLCK41064157.
Groza (Feat. LaMeduza) - Formally Unknown Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47caf89056ab52f8fc8a9bd3836f6a8f89f862797caa5af94e03a3e46f22431. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/NLCK41026165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a53e0bf1db4683079f57470f1075e75b809a8d8fbebe3567916c789b7e5c18a. 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/DEAR42032243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13e77ef34f83c9ac85f3c2b1c8d081aa4fc500224287a8e27a058c78f2cbbd. 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/FRIDO1911594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18967df893d9a45c7f7be630a2ddb7605e130ed044121ac43cad421b98fb3ffb. 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/GB5KW2300645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45be023d89f9a07ec6d2dbb73f00c5529fc1be378497552480a851d4de9bf00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD1900534.
Crawler (Ft. Presence Known) / Music Within (Ft. LaMeduza & Pod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe66dbf00c21d8a22dd3439cdd87adbee0334fe94405ced278b5b311d589cb0. 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/GBSVH1110007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8168c4bfb8892bbc008924a6b6db5bcfc2d39900d9bdf77bba9d160849bc42dd. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBRF51400013.