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 0x56f06be1772dbb2d99755590ce99c25530d0656a8229f65ce1b17f142fa73cbd. 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/4f8ea108-d7ab-4250-80c6-59218ac1753d.json and https://artists.proofprofile.net/proofs/artist/4f8ea108-d7ab-4250-80c6-59218ac1753d.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 0x5d92c9ec78102cbd991814b20b6be622612c41ceb069753ff7ffe83976caa49a. 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/DEQ121855121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71d7ef7b957a4c26e639d230fe41b85e61cef3abca7619377f9e2d3fb4d04b. 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/DEQ121855127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e2b3cfb6b996ab72a5ff114c28eb2137e5ae67f4bd7bb186707afda91fcf4. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/DEQ121855128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3116d675102043370d619790069f422c5adb0e4cf112795e6fa7309f3e2f14. 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/DEQ121855131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd464c03e91dbe9afe793a8cb6d1f7296db685e7bb1e0ce4fae66c3c9322085d3. 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/DEQ121855133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a52751912da15e1f60a7eef44b91b644ac88387d1c9ad90015b294c59160a99. 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/DEQ121855134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f7508a31f186e460feb7cd3c0dc105065c05e328b78e496721125a295cf68. 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/DEQ121855135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e6b42a610f817aabf5ecdabcba29a658675f5c2d8a73c1f2c142407534cf06. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEQ121855136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27100e9d0c51d659b44de57c9b0fc9baf46664b6444842b5024ab9a84aed3d81. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEQ121855138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db74493468ebbe5ac27fc5f96ea73e9f83fbe694908cbcd8f43fe0a5711f8cc. 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/DEQ121855122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1a95299fec95d40bb5b2363ce48790807aa4c5e63d78cd5f3753035e9c634f. 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/DEQ121855140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d5783ce72dbdcfa9538c36d5d2b82106c150d2f526acc0dc27b03646b8bc1. 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/DEQ121855141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f64696a4e3b1a5af2292959c59632800310b63cf5285778c058f11f70ae976b. 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/DEQ121855142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3e633ac1e74f26e0f92dfcaf97e3809ad33bf754efe1d288801cea7180261. 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/DEQ121855145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b30a5bba444f6630811df587fd8ecd9aeabd373b06881b86c934f8d3daba1e. 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/DEQ121855146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd9215a2fec70e8da620c3f1de1a66a00e76152aad2aea4c7fd21ea180695c. 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/DEQ121855147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40437c3d870f460d9469bc40db6413f90716568beba00ffe2fbcbd546608be09. 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/DEQ021901952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05579eeb7c3b0a0d65a90b8dbe19b9508dca4f3bb31b92499183d71a6ae12334. 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/DEQ021901954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3cc0e8fd665c672f3856f5068875975cf2e3b550e1d66ee27ce527800af154. 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/DEQ021901955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165bfb2b1c829c004080e67495379a3afdc31a5dde6548020019658d91d79cf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEQ021901956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e03077bfdd015ed7b7fb747d5088626ba0d6d94658e2d6e9b54f76b4e1e344. 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/DEQ021901957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981efdb826a2808863d03447bb697dd411df4a3dea59c8e41e8840edd1e7221. 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/DEQ021901958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7dd43c9c4bfe906d2fcdf97af092610e45e40b145163b0fd6def777ba3ea52. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ021901961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ca042d30adb9445deb3faa7c68417bee2eca8a7eb23c76e0dd09f5eba60b9. 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/DEQ021901963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad4d4e175aa5e00af21024dff4fdb7678406c481422c2494888b7664da0fab. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ021901964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42cc68688d084d8cf2fe4391b775f75badd567627457c457c1ea7b6338a2216. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEQ021901965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b98fe27d986ba2fe67303868b6faace9ba3b8a9d134a96294d717260b0cbb1. 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/DEQ021901966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b7bdf9c04ee8bba7db67301416d152b120cbf4c05fe0fe23e6c20ae9f02b7f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DEQ021901967.