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 0xa6023d754bcc9be38908a8a80dcc818e5bbbdb19a5237e7208c299863c32109b. 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/27da8776-3a66-46fa-a782-66b54b503c3e.json and https://artists.proofprofile.net/proofs/artist/27da8776-3a66-46fa-a782-66b54b503c3e.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 0x5dbd5518cdedeba0b664391448dd6b5136d98f29e228f1fbd89b48d26c1c0e46. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:31Z), 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/ES71G1704560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc51bf1cad5d09c6c271525e27bd1cffd7135b881a70e317a86785ebd1f083a. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/ES71G1704561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc08d27a24ea175589bbcf76cc8ae3ae9f0c44b200d67b3070c5e0152ac647. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ES71G1704562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feda2b214b896cda072cc29e2571521734dbc0f8d826560c348af510b7b44c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G1704569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a8696b9ab78874828188e648b05944f984f4617ca57a32804f5cd93fd4beb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G1838346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aecf8d3a4cc8bd702156654019382c12b7a46f1a29c5468f7ca6a2a055c623. 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/ES71G1838349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3364470282eae9002d4de0b5c1e9f0efed18b049970e5477569da2343fa46b. 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/ES71G1838350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b46ceb1880a74b1e8425c4e2eb19d468add6d1454300c3fe17f3b238603798. 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/ES71G1838353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebceeb08e435c1ad4e07e6740a0d78b42c12abaa8b4fc8aa0ca0ed9e9699d23. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G1838355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f89ae0e28a3d0c164273f54a26de2cf2f332d4ab51d993940ed537d42fe1c69. 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/ARHXW2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c55c7d2efabe4ef9926371f299e2bf4727d63a5e771270e7ef930ef0815cec2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARHXW2500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf216a8d2a865e7a3fdc16d470589e3690842c679ae94d1ee93a835959cc6ec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARHXW2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1cf021f1ace32c6d9db54524bc974ac36d83bd23d4ad4a3088b7946291fa3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARHXW2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb967fb632c8e76b0e2bf0e944e8a18277a53494805dd8c0842fe9137f75620c3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:06Z), 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/ARHXW2500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267e0d1a858dbe244cef4186aeb6d5a3a572a780fda3c3015ee48b142884a1d. 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/ARHXW2500197.