thumb|250px|Mauléon, capital of Soule Soule (; Basque: Zuberoa; Zuberoan/ Soule Basque: Xiberoa or Xiberua; ) is a former viscounty and French province and part of the present-day Pyrénées-Atlantique
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 0x751a523b2609d5cb49fb48d266ac2852c288fc8f5f24884f26777a016864573b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39b7f32f-4423-4104-b1bf-61db2cbaaf2b.json and https://artists.proofprofile.net/proofs/artist/39b7f32f-4423-4104-b1bf-61db2cbaaf2b.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 0x112cbbd12a0f7ab3fdb7d226bd65a9ef3a42fa6ed0ad5a0b01cb3f5deb978cf2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCVP52300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed5de0acd5f2e01d16a094c60098f5726dfdefb1ef7ec30bbb820ac1b5470a. 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/BCVP52300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94268b5bd1c1e046dc8006396b9900035bb39f175f2c942dfb62c1515404dc62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCVP52300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcbc873edd1220aca5092e9e2c898216821cc04626ff71982716fcb0c716a32. 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/BCVP52300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e079ba1d53a9a50cd351622bd100504e0f8f2a43cf142211ea14330ff22f013. 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/BCVP52300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b434cf45a1b8340eb17bc3de1ac93cb5fd4cf3b67865fbf556adbeffe27f1. 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/BCVP52300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112cbbd12a0f7ab3fdb7d226bd65a9ef3a42fa6ed0ad5a0b01cb3f5deb978cf2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCVP52300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac10b86fa5babedb1202fb70fdeb94f156bb6ba088a166fcb9ea8ebc4a27dcd. 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/BCVP52300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877fead6e68f6e9b3f3bf0d84c7f74ea01f48a8a8f96e718a0ebc4feb64e786. 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/QZNJX2431584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135ef4d28282caae3f5374928648a46c19a2395389e2d730f856c51e2a66808. 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/QZNJX2431585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8305dc7d78b1535446626cdfea2d94a0b8c72dc0ccdd5ba1dd4ca484df711b0. 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/QZNJX2431586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914e9c90d24db7e9be6bb3f469210998d11e3f2afd2237cda6a291afbd9a463. 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/QZNJX2431587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69bfc50aa2d0c21e3fe0a1af41c2c2081db5f96f2458f3642ad9ce7eb2c41c6. 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/QZNJX2431588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72899a39e3eff90858a9b7ada7ede56bc2449edaf95fb9981df32cab32e39da. 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/QZNJX2431590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37274cd1382ec4797386cc7074433278764c4d2d58189041f1ace4e52a35958. 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/QZNJX2431592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb291bc53c182fe5d7c0b2d39df32580f14968ea9c24085c6fb88a2fecf33f24c. 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/QZNJX2431593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f80c7790a111209c96e05eb9c130cb742a9e58d5c509801a3297129fcbba7b. 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/QZNJV2588043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f98300cee8941a1c3b871ee7b62422df2a9fbcb834b9d26470e3ec27efcb0. 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/QZNJV2588044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7247c4caf33a05481fde69f5546c8cfe414c487711be8a6467ef4a4768fd00cd. 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/QZNJV2588045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5eeefcf710860009c7071ed04c71630b6fb05469410ea2b18476575f06e39. 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/DEH742400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d0fc9c53f7c68e243d1f1211cfe2dc70a0276875fb67a50c29b36e4eaad0a. 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/BCX4V2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e83af8cb3778a822ef4c5acfd0f38ca4064cf13ebb30860e9ce56aaceed25. 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/BCVP52200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf722e51324c3bd2d8d49e91d0376b7f6b3034fbdf58bbd1aa7591f73b1632d06. 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/BCVP52200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c18944bd9b76e9c212059984914c8317a64bf734a9ec22677919b394c82b677. 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/QZKDK2079291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b5b9f628c646ca59f2b3605e5e4383066a5d5f7b0bf43f482e41f1c37b5b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72401179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc653ca3d38ee3b3cdadbd0b6edb0e353bc2a22677515e0c8631e81e7825304c3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BRUM72401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c536f2cba9c8fab413c430230e2a4a0d84310288599e21759db64d644c0c9d. 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/BCVP52200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e9008c497f548d830ece2c92779674d98d27104b48cce3a691a8544983d10c. 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/BCVP52200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527432ad616044462f20ff941d1119ad86a21d668d79a8ab79ee67dc49de5fe5. 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/BCVP52200029.