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 0x58cdc9a0c7a4c3ddda7238a261fe7d143ed62f1228b611ab2a0a6a3b9e00ed41. 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/70c29276-3345-4482-b3d2-460fa0954794.json and https://artists.proofprofile.net/proofs/artist/70c29276-3345-4482-b3d2-460fa0954794.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 0x02ad230423076bdda04ad85e3cb49d043b94640d30561bf79dcb34a66c0b5e73. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:23Z), 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/ZAHC62000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e796a13966c5b0c55518b3f20b9eed682d5fb4ef9b8b0c17365186f2c38200f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ZAHC62000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c65d871695f1d81c3fc8601d175d57373c748ff1f6906927009780b6023345. 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/ZAHC62200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab8aacbfba7b16111adaacfdaefd334f6f7bb5c080e4e3da302f00bac8515c4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ZAHC62200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04c0d0f31003c1e601d4e1eb59e1389898d8dca272eb5dad44ad4ac4a84e99. 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/ZAHC62200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb537c842c67767354a4e7f486798f240bead94a361f6d66cd602470e677e430. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/ZAHC62200512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438b70b57420b4da70904850cc51855bd5532e481217f184cf6266fa5d8efab. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/ZAHC62200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae658f87e1c914128984eb98e9a71e8b90a028387dcd5fe0a78cdf576b19c3fd. 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/ZAHC62200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1099fd7950afb9e980048c9769722745e6cbff97b30d440928090f5db8677a. 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/ZAHC62200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb30e8e5458d7d47a0b87f98f5b29f750a2258e5695ea512feb788ede03f990. 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/ZAHC62200517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd08e3070cb526e6e8a08a767467313cedbaa716a9e73784f1e90a04989e71f. 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/ZAHC62300957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2184097cf9cba6cab2737e868d894e7f1691250e05cb895b30df3f049f28a6db. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ZAHC62300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fcaa97dc47e64809fa85a5b4f788b5e658839cc5355d011f77fde57751fc5. 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/ZAHC62300962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa98b25bee61a3766017506e31c58404e9a3e1e9b3ac3038b6bf2bd39dbfda9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:16Z), 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/ZAHC62300963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11d914432266778ef9499eb21058d9a514701a2e51f093baefd4ac4a6104432. 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/ZAHC62300966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe320945df668bab2964fbff706c60abc3cf55c20e75f12643eb255550eff5c7e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ZAHC62300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff09e4c20b0c5437489a4d8a5dfaa8fc5015dd90a4fa996a9a06c45da718fc52. 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/ZAHC62300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5bdfa8f538a5fb12f37f2f049785eec321c829077494e490688e8097382546. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:35:33Z), 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/ZAHC62300969.