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 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 0x535dfb1c8efff966f1f7ce9cdb9d47dd84c1c1ecff40fae8fcc9d95cb4c2063a. 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/77204b9b-221f-4d59-8bd5-90f6c5f2d131.json and https://artists.proofprofile.net/proofs/artist/77204b9b-221f-4d59-8bd5-90f6c5f2d131.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 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 0xa43f9f1ef3131790d05b8a61dff506301da69fdea0aed502ac4045f47aa51ea3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USPSI1600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e79a02f66ab1c8d8e80561c500541234145a96463c578e4ea65419f9ca9ac. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USPS11700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745bd6af79288bda8cdf278911550be19d9ed40ab9f0a090e176e20d29e1780b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USPS11700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0300defa2fb0902d749dd953d2af98609748263573c9278b7deee1fa8f750. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USPS11700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7681ffbd1a9de273dec65fb27822e09c900992a6f9814424da5f20f6fe8d8fbd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USPS11800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6785420f44bc1968491065ea9c10d4b54489fb277c51b7da4201dbd57fb99d8d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USPS11800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d2aa142ba1ca1a1e287fd1a54326c4985449151f5d68a62cf9eedbac3b2510. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USPS11800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd9d0152080decf8ad0dabb2e7b0a1ae777210d18092fbafafa513becf7e11c. 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/USPS11800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45502f604d84f5fe96f4a3d77392ace735a4f3d41c4f2ea1b1b58cdd5509b96. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPS11900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc434e4990fa2d08a511d2cd21aa29bbf5f0baf8467b7bed2f8ea2ef1adb8cac. 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/USPS11900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e633869e0180be607a8d64bf5b84eb39a7418187a4b25f8c98dea5b821f066. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USPS12000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549868e07fa205109be670da4cadba53391fa8116e5d6ffc8eaa9a1343a4c7a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USPS12000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd625d59490046fba10987aee24821566b392a0ddc735f06f4d6a232c9eee4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USPS12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541339b1782e8dd7fc08d924e98ebc29a1f4418569d5b4d9b70ecb7c5f46ed82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USPS12100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dff910475b1d51a0bfe7d5b624d3b033aa8bbdf446ab79d03c7b8617fcdf71e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USPS12100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20edf0af83ac04d95d23850dccfb94c07e12f52bd4ecd8c097278037f71b2e4f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USPS12200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89d5b0eb5d644f9ff39c2555de772812fab8014a794d28a98e3857da71d22d2. 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/USPS12200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf833076b7323c0e72641d39634ba8851144747441eed26b5070d6d41e939d391. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USPS12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc40d3b0007ff0d9fa3340756c2d3125fdf8596209d16a509e0a558a67b1bf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USPS12200011.