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 0xad24d1d2e90c498ee34862f8811d91dec0f45a02f0e6c49fe98fc0d5b5a29e97. 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/00f96131-da97-4235-a61a-893aaf2c6f7e.json and https://artists.proofprofile.net/proofs/artist/00f96131-da97-4235-a61a-893aaf2c6f7e.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 0x901d3ac698f91c43a775eca0f98d1265cf0c9cd6f17e3ad79d393badba7ee7bf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL1LE2202751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513210ad8c02d1874923009a0994fa7b988620098fe9fde58e021acf8f65c060. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/NL1LE2202750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2562dcd0e89b60630859a82ae6e3dbb364ce815934e64fa6d0b0164eff5b61. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:42Z), 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/NL1LE2202752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003688f690211490d076b3ca0817f4b13e2d72b987c56e01b01f5e01913ced1c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NL1LE2202749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554fca4e221eb6e702c036c969ebc5369107daa8d7d7396db766cf83caeea054. 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/QZFZ62421197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb41040aae0311e6ee59c9cd08576b51c015ad0e431c1c66b8a6032c571395f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CAN112402120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20ba05dd9849f8fd502d8ccee4f10de2263e5acb89e63904814f60861b0e82e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/CAN112402126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cdc04aa8ae0fd4f4abec10fca7dd8e6b6dbd66a39326dce216464cf65f559a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAN112402121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30900eb69c2fac3b357bcc6a9b6d9c94b28af4a9f860dd9fc4ff862f44a1fdea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL1LE2403654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f8e8833603985146fcc68a905936fa179c77243f4e708f07c2bd609c18f39. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1LE2303429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f708a0d12814e1d167bc68cdda45ecb50cf5866ac3aff1fac645558925e6de3. 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/NL1LE2202656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1233058ddf64666ae032a26dfe93c3b046057c9de642703192ffb95d2275e604. 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/QZDA62475753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45136868d6d48a676aa67d797ba5aedfe6de1f038bc6ebdc72f303bbd3d01d. 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/QZNWU2310910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafd8672b3b88c76e48430eb28dd9a9f556e0322bbed334622a90127e218ec05. 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/QZ8GX1701328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce804d9302e63e6a035a8960e3a0935934eca565193170ef6ac2472b15cfdd8. 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/NL1LE2102279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30900eb69c2fac3b357bcc6a9b6d9c94b28af4a9f860dd9fc4ff862f44a1fdea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1LE2403654.