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 0x1e5ce2e858a6a51ce63d505733be9270ef8509c4e8ba6e2686962dd1f28fc626. 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/9bd2885b-ff3c-4cb0-8c02-d55c303e5c6e.json and https://artists.proofprofile.net/proofs/artist/9bd2885b-ff3c-4cb0-8c02-d55c303e5c6e.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 0x3e13c5500dceac4d227e7cdf765c0b07faa651a9ff047a283a17482176ebbd7d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:37Z), 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/BXKG22401424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762f40040fb8e0dbb8698261b6df3147b7f776453b5c0b7879caad9b3e6c1d99. 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/BK0TO2400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe27bc26890417f3d175387c81efc47c36c90eb87998a2c8ab19e470b9d055e. 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/BXKG22402250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb73866c95bbe3a7df78e35f9008ea9aef7ef642ebebb7595613c58e95cc49be. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/BCAPW2400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd938229a7ba9628ff36ce19bf7c5ddefad0a44cf54f81c119139a22db96b1f. 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/GXBAV2584854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254378af8878536825c16df1b8351135079aeb32a06d9c84ae51aa3bda64fbd3. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/SGB502586223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300faa45b42e744f3e9e235ea5d4908acf7b70b12d6db187a6a4b8c6ec1e9c9f. 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/GXD7V2515963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2324eb957b32b84dc727aa23db30529c3a2e278b8076ecb2e040726789935. 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/GXD7V2591736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a866ebe7a2ba5fa4b80d2aaba2f19511668389c81f0d9b34427d440f86e68. 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/GXD7V2510461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d50ae24dbff643f47fec5da60dd6d0c5dad66208c7388c7f7f7d0c025816c7. 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/GXD7V2573050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3018476d73d0996cab9886c8356e2ccec5d74fcd0e6ce2ba688ac7b8dd068f0b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7V2575718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f014e8a9a8339577c2b60edfc1ac41b09e9a08b9ebeef7a2f99ecdada9140. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:48Z), 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/BKNU22500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a15239beb3ca3bb4002ca08111e1a1ebf37333286448c214dc51acf8639a02. 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/BK7NM2500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09866afc9372d2980003fac993b594c3cf74dd824df96b7ae2e271ba0a77bb1c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BKQ0W2500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0979f769bb8f3c9b7db4494bc2bfc0a960abdeaba5c454e5da34f0d7d056140. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BKNU22500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33cba36e9830091bfb74fc2b1ff142e267c6b063f6525cac9f5d027b70abd9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BKNU22500382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01171bf0b7a66ff747b0c7bff73ab84bde00f6dbbc9a756b5f1e8eba6be7d65d. 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/BKDFK2400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935870f658ea1e2021870530d07c1c2e9bce6a4c40073490c9eafdfda1ac4f8d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKFUX2301139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9020597c0886d18ad1c0580e76a53de58958d6ade4c482c435c506eee783092. 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/SGB502565001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195d3f0f7b582d5d333980b1ccd3362a7dbb98cff076a570077288ddde249914. 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/GXBAV2598470.