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 0x09bb8cfe1130d231acef394af5b3543177aa077d3918946604b7fbc07b20195c. 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/7cdf8393-04e7-4e5a-b505-8ca512dbf94b.json and https://artists.proofprofile.net/proofs/artist/7cdf8393-04e7-4e5a-b505-8ca512dbf94b.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 0x5daf2625c9201738b86389428b147e0e3de3422e03186b1dfd59f0878d81d316. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE862202445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c50d655d145de706f94583486f184ee7d0db1d5060533c3f3fc102cf1dfb3e. 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/DEE862201433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e2028fe03fb4f23743582cd843d2485235f1d1838c35e4367126c078bc2ed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:04:20Z), 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/QZS642288940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a85ae9bfb35f08777774f8ddb5fd80fb25b62bcbf8b836441300c5cf4d0d872. 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/DEH742326627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0df403101832e41e546d91efbe50ec3d32160ccff41cb2b0dfd7de1ebbd0aef. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CA5KR2411702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a8f525c9545e764200f634ab510a2c69b07d71bfaa1480824086ab50b8706. 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/DEH742334361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feef8a7a74885a95f97fd29941fe6bcf53bc58c421a72f46c3a599b6135745c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CA5KR2414698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26485b766f45f29d9ba75fcbb7fb30d64d79a8352e45104bedbe55b98c52f33d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:57:11Z), 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/QZDA72439349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd630f8c63416d4dcf0b03e0fa02c9fbd6bbc534b96ac6272009af3caafbc473. 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/DETB32400583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406a8b3099a1c92976703b05a33108c23ab7821eb98f5fddb37cf179b6b44959. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:53:40Z), 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/DETB32400586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fe03c1fac6f47ba85342e9afdd6a00a01808bc6ba4a9e51a7b0fdde8c3e64a. 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/DEH742430065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f303c19e8a56a3f53e75af7aab3cb439c350e794bca967e47c790d06bfe151c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEH742430066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0093580cc757adceda5ed19bab5d7870c815a371a12f536ee0d0fa07fbb779. 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/DGA0H2421547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e13f511bc4102a68eb236e73f604e4b53406c97126484c6e52e8df0744e39fd. 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/GBKQU2498345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3987d3f0cea9ae52ec9a268b8367eb402725a43e7e184ea6a06a7f37c3e3e5e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEH742436748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c739588527e4e9f861e6e476be0e7cd2dcc6111150bc8808ef2037d549f03e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ8B2474916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4c8078bffdfcc2784e042b966562ae7cf682a202fe356db4080013c69b515. 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/CAGOO2439629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988ec271b4cab62d99417b0d58daddc076c610f1b3cc472e54c73abca8ba91f. 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/QZS662439987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f03ec39020fdd382a9b5186fe1b6209427683b87611fe46ae8cac934200692. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECY52400642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37651cb1f1e1839f974b604bc0e2ab9e5e5eafc5247bb5d790c9ade7e309acc2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2412459.
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 0xb5e719225b760e128a7730f64c53f7c9c6d89c5e6555559ab2b82e247e24e1bd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEH742408894.