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 0x0a39e3482b6dd3269311165ce044dd5fcac98b115d53698c36082116f391c3df. 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/1ec722c3-ca86-4aef-8fc6-fdc5dfdf669f.json and https://artists.proofprofile.net/proofs/artist/1ec722c3-ca86-4aef-8fc6-fdc5dfdf669f.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 0xe15c4081f5cecfba87882be03948f15f9e88ae78b0563ceac71f3845e7f58648. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEBL61189107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0362e1635752a17534577106fd0d8f74d331ef708ca9082b05beca5e97ce34. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DEBL61189108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9704f25316b7e2d07977a7d1d9a2cc6af2fedd16be5ffc801bf5790ec2044ab7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEBL61189109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f78f3f07db731ba6c697f2d261ac47796ddbf7a1c35ee29faca9cf55ba6197. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEBL61189110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3741578614474a63bcd563b6f9f59a9878e5f8351bba14fb2d55c4a66221b2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEBL61189111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fb4fe315ab4a9eeba4d33c363722c41130977a7f3d17c9dcbdf4e5b8ef98f4. 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/DEBL61189112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9c25714050c6476099c612f60df72964e4731a9d40f21ff80b6186c7a263ad. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEBL61189115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8061e270de19f2ef3bed1d730248fa80c4bed45ba39f9190e93a0d371806ba02. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEBL61189116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b13bd221e52e7ce9db0e47fb7fada8c4b30af5265da5f32aff59ba8945f3b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEBL61189449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4119350503db6c86d6426373127697ad04758c3c087b11b17cd1a976543c534. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DEBL61189451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a3fb3cddae3d948fdf91f4b90972b9126dd20dbf7195c5819fe95b99cf84f6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/DEBL61189452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a27c888b564e11bb6ef5dd54663f8962cbb775d1206a76b771a6e2f627afa9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEBL61189453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5994e7724d79d4e61a0cbfd6aaed416485781ffa4bed7fb9c8e890a0c259504. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEBL61189454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a77dd4073a3c32914567f703751b5bbec3be91ef93199d0a7e024b0114de7. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEBL61189459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9b0c34ad2ed88a53e4fb7faa1854dc7ab48f765efd7242ad31ab8aa7dea7d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEBL61189460.