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 0x1fda40b42b3e91cd7f340c18a25010086d5ff0aece9f69af3cf063fc16188c74. 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/43e69b70-7710-437a-af1b-280a43e13d5f.json and https://artists.proofprofile.net/proofs/artist/43e69b70-7710-437a-af1b-280a43e13d5f.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 0x3fa78283d42423b2cb1cc55590c1049a6452abed4509d8cf79a580ec679653f4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLH511200673.
Towarzystwo Ludzi Prostych (prod. Donatan, skrecze: DJ Kostek)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe80813e3f21071f9990f339f3bbcd3045d5f641d48987a094271876cb009c. 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/PLH511200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aad7a6e6a4482042321bacbbeb0e678ff80fcd064cb281ec55f155afc095f1. 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/PLH511200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e952ae100b447eca730795528cc2fca6d516446a958f8cbb5e0020baa8bdeb2. 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/PLH511200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23cbde2821771ca0fb51b1611cb7f1c6b6bd7aeec61a1c0723a8881efe2ff80. 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/PLH511200659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0025e02cedbe47c8eca2bc12ca337c85a0a9c9c6026ad41bc4fd09e4814ef91a. 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/PLH511200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392df77d23ef7497e610d887d406f8f3af1b8db80c5633cba9627528d5a59672. 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/PLH511200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7874e0eb66d16be9150f50ad1f8f1c8428830b7a71d5d82b69c9367429eaac. 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/PLH511200662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe80813e3f21071f9990f339f3bbcd3045d5f641d48987a094271876cb009c. 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/PLH511200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665622cc3c560b378abc07d9dbefc14357f6b328ea863ac8d731f686c44c8f3. 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/PLH511200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31583c3602b07bdf35c34ed4e061601c9ac726ac6e5ba3f3515c258c1dadb22f. 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/PLH511200665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fbf9161c7110114d2f6ec62479ddb88a795051b71a01fd2b91cf86c37e794. 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/PLH511200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974afb36a38aec9c01d2d025136226d47b64075b1750aa6e6e5f2e2f4a29b9c. 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/PLH511200667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59089ef7719a5855fa11d72ed4791b75806a63a5f701b6e690efb93bb6551b7e. 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/PLH511200668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3351478dcbf43d06066bd980c78a3a46920c6fec3ec7ab817142918e5be7e35f. 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/PLH511200669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ea83aa713c079db0897d7e67061015ef2df1044718a1b8234efb0da9cec59. 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/PLH511200670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f1632b77ffccc4e9774084490f96f972ca33d95b2f9d8b51e2dd6ff551c49. 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/PLH511200671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc4fe197fab11ae76f3c3663f769149e187afba5782ff0aeea4b24cf44316d. 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/PLH511200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa78283d42423b2cb1cc55590c1049a6452abed4509d8cf79a580ec679653f4. 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/PLH511200673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e389626ddff7f26fb9d204c4df4706c54d2ee5ee5e568ff72e6af7ba85389f8. 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/PLH511200674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0772d55aa0e305a1f67fb4533eb24e6cee3e94b36dfbd212aa9f96ca5422348e. 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/PLH511200675.