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 0xb304502fd738e24857e715370bab82c899cc0517928074a2a00f46d533039ba8. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cd71138-ad9e-4e40-9531-34615dacee4f.json and https://artists.proofprofile.net/proofs/artist/1cd71138-ad9e-4e40-9531-34615dacee4f.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 0xe73f20ecdaa45bcf4b48cce9e3b6ff720cde3fd9acfb92780dbdecdba5f2386c. 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/TWBX31610001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6206cc51bb7450c9780b74b4fb21ebee4dc9c877322a30220ef41b73d1946bc. 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/TWBX31610007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a788717b5f417998def491741f9256114b0c53e259301b4a250a9d3f7926462. 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/TWBX31610010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211ea4fadd3e539faafd9cab76892e7b6e44efc1941f61ddae310a2ce3added. 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/TWBX31610011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c921afffbb1f5e1a0ab520a1cd22d0c17af3911a158195ced49a6ce12e1467e. 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/TWBX31610018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa3b6023f518042d19d8925c6898d2c2bb3e701220f33816c1c25860b05499. 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/TWBX31610019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1821ed58272cff0a0a664f6182f0315adc814e96fda1d311cfd35e8f01e73d81. 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/TWBX31610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f961362b9c30bb2f1fc815e060496e8c2cc5a5540073a2faec27cc565eaeb8c. 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/TWBX31610023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85025c33cf2d62ecb8109ec330e26fe2357e25e8c8abaf7db23987092eaffc49. 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/TWBX31610025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497467903f4a8dd15dd1a9fc742d6106e597506e57a0250587f6a2680be7db76. 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/TWBX31610027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0cfa8c5a7b14b3d35ba6f7b7358ec4d1ecdfd00f6cf62891dca8c54c4f616. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWBX31610029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c21397e4f3e312b8598fbb017e71c90455ce501daf9b52b7b8e5897b0d5f71. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWBX31610030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353161a21eff2bb951fe3304ffd2a09da1288b7b61f067adaa5db3c100fe223. 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/TWBX31610032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c25ac8498f16974f432572bbd2d27f01556bac6a83293ea314863885690d62. 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/TWBX31610034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ad37f3965e050f9a5f1bd6483d7c75f4abedb285d45ad9e86bccde4b04304. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TWBX31610003.
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 0x6ea45ccc881aaee53bc853eeb77d0c391ca82b40d8ac12de1b4619faf844ff46. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWBX31610004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e56a617a7d53fe55fa0522ee9b5a3c88c39bb562990954c41ad8747d35d94eb. 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/TWBX31610005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec5a75f7cdc4ced6cb904df6443219a169773fb7a4894609535b01388fb9103. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/TWBX31610006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863eedfcf17ee9ea13631fbe8c1257a553684bc7374aeee9edd479f7945d4c1e. 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/TWBX31610008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d1fc4e64e7f5451d3b4c21650b6badcd67747c4065f86d97535d27fbc1c4a. 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/TWBX31610009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547adff7be248a7517c908ea8b57c25801b36eb6487792cd723c1f16bb72dbf. 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/TWBX31610012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e978600ce86461041614f2b6bfcb9ecf00b526ded3269702fbeeda8e79de353. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWBX31610014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d3055a5d565a200068377c843e1f390dc8ffe993da38d7f2c6c3a00c0753e7. 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/TWBX31610015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67badf665180390b0865e05707833866f95ec4788249dc8e54baa19b5e1a6b6b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWBX31610016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bc07f7c0a99ffce6d8b1786e0847f4fe34f8de789c8d553db340696a9802c. 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/TWBX31610017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d77f595c95a42bcfc3c03e964cdc9f0bce86b125a2130774a5374e3ecfea57. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWBX31610021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda25b57e26d6668f1b6419cfe74f7b599e6eeb410d83fd0954dbee93b4a36069. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWBX31610022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf825eb5bf8c69ee7a2fc265e24b61534a603b5bacd9c1eeaf7faedd60ead4b2b. 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/TWBX31610024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00816a49a06163db78e421436eccb5a246a69640e879f7c59df4da59337f0b16. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWBX31610028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a113669f2e028cba2aa5bb887849871e8016d5785e4f27a37cb9992d8f39ecb. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/TWBX31610031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566a012c6ad1ee3db710502d635bd85d00311f765b53f9b80e7f8f18fc4b0bd5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TWBX31610033.