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 0x0b75196532c5a8532ab21f0ac027c6f1929b36fc68de14b255a1930198953181. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac0446c5-36a5-495d-8e93-2c0816f7bda2.json and https://artists.proofprofile.net/proofs/artist/ac0446c5-36a5-495d-8e93-2c0816f7bda2.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 0xac43a17f34cdb0edc08a251556b60a972ec08cdc8ba396098a987aae33479a4e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SGB502389942.
Mtg - Especiocínico Espelhado (Acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc634e23ebf71d5f257897c0cea9b568f4eceaa6df7e23618dd30cd53f0ec98. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SGB502441562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d5dbd781c8da785e4d44c89dbe98d46864e46daca5b9a2cbba81853ec5be6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:14Z), 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/SGB502457138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f1c583c5bfb0b22908cd875a338a23a04f2e16d6c46c46fbd6c132b23bf0e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:32Z), 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/BKFUX2305767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29165bf4ba04a3bb26283c194359dcdcecb9fa151a63cf5cc47fb6bc3624aa73. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRTRB2500823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c1fd42f0facf98a5df7d774e24a0f8d7d564ac0675af4ea27ea7b7adc171b2. 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/BKNU22400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c1fd42f0facf98a5df7d774e24a0f8d7d564ac0675af4ea27ea7b7adc171b2. 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/BKNU22400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68a88291949200d87119f482479ba69e2bda6060e4413c41130cc8e4cf976b1. 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/GBKQU2453165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59188e5367fa14d88ac50fce80613fe0a69786cd9254aa4788471bcba8d8b4b. 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/GBKQU2453166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7297e845b5c5ddcbc35223ecbc9203355ba586e0ff4b7bf6ac6ccf3a645f701. 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/GBKQU2453167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff110864d78b37a93cef8394a6fea225963e6ddb24f9703f5f0d06798dead53d. 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/BCUWS2500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b67788d6d1b6ae06b95a2fc61558b1e2d6c215e212c7810a3c1d55c83a238. 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/ESA112561209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e690a0869ed516e5943937e427a0ce673834e7d54da046a31e5d8a477daa6c. 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/ESA112561210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc778ed80636b80ccb36417d59468fb4515ae0d6754592bbd5d48910168ccd706. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5FN2572510.
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 0x7fd8cea34802e24aba7478964616501b914068e88ba5948846d16be27607e256. 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/ESA112564596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416b0d28cb4d4d2cbed1082e356938f24f5c427c81ac185e78bd10047925e8c0. 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/US7VG2555228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd916268e7eec4102e948c08b26979111e332367bb4d537af0aa4d9755d34b978. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/US7VG2541936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee92b1393add36b5b8c43a4864ba4e207162a0a6479378c149c7536eaaa5f25. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US7VG2541837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7d3fd12858437da238cb2519103181c8097c8330d0f912be8d243bd803fd8. 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/ESA112564876.