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 0xe32c3aa537c8f8e370a1b1cc18ed0826b5d730fb46ee810c1a2c465c91071c88. 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/b8e44264-7e63-40f6-8f7e-802291df106e.json and https://artists.proofprofile.net/proofs/artist/b8e44264-7e63-40f6-8f7e-802291df106e.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 0x1177efc2fce8bf27420667ba2da215ec8d392bfc1747b167d1b55b90433820a6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBSMU6933772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7faca2e9122f4dd959fcc3923935d5d85935db53df9b52e80b5ba0cde922067. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU6933774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803fa845712f73a8dc666d4010ce4caae085401de4aee77b81a00b9de4304001. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU6933776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa3536ab6e9eb41f4142c7d9705f54a1e026fbc8925d59e0d55c6fbb85f6065. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU6933778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23750309a48606e6714b9e9e133383cd332d811b69a1e9fd0ec65089708054c0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBSMU6933780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a42a5d09136657b7308430706afe13bed86a315feaefc0072940ae013f4c8f2. 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/GBSMU7274139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ea5eed8996f52fb04d57bc4ab116bb61c35efd0e257442052a3a9984732c5. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBSMU7274158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1dee265ac0b9bdaed64bfb38cf80d7759725527fe0255a60c365c889dc69a6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBSMU7274159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba41aa9b0ebd41a2f6ce3441865a14674b5e3de581cffce95c06527fbadeb0. 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/GBSMU7274160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1438b8ea8e82ee25a0c577d2cc41ad0e2d4a8a97088f914ac33439c21f06b755. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU7274161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6e3abb6b3804a49d1d7fbab380937acb8bd8196c6cf7ac01d08dd12b40f17c. 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/USDA12407309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f460bf83d1bd95b145918f28fe500d281a2ad7a2d81ccbc43306cb96088761. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLZJ2546150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f2c6331c19f9a70e68adf60287bac3582fca019788ccd2715d02c2d888581. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ2546307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b00f0029ef8fd309e498c9b4cd9d1ead85cf7441d98e7e4b839c77bf783705. 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/USLZJ2546382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e5a87cbee303781f6bd0bbcf292eb6d5bd968b05b371c9f46778f4ca2267c. 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/USLZJ2546426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0748a2056f5f5f54bacc08ccf37431a4772174fc5a5a049c87d73dae08d806f7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USLZJ2546495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b21fc911cda09f89fbb6a608b6b52713f72856e114828384e5a109ce5fb5a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWDD2545168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc86550484359ae00a352895c4aabfdada477bfd6da1f344a6011ddfbd143577. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZWDE2568193.