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 0x1a774025a7d5521fa1fc42f87e445356c22c1fe96118c3a31dd1c5af46621f64. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8e13217-ca29-49e2-8503-f1181199bb37.json and https://artists.proofprofile.net/proofs/artist/d8e13217-ca29-49e2-8503-f1181199bb37.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 0x8541217c1e338d451f381937a0fb475df75b8dcf1f693e10276559b429fecf2b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHX2484687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40495c9839936b0793fea4fea4cfeb63eb6bac1c43974ea95e9c4783d18b0aae. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHY2407861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb295c195f1843f57865254d7a47b20aeddfdf912b927041a7970c8e5af4e903. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:52:56Z), 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/TCAHY2426460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece16293d1b6d464eaaae641dcfd50c9931a0cfa6971e28c0aac1af3ed4c5d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHY2445487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c09aee0a77454c18f6142fde8f98ab532b760ab1d94b331ae4d884fef51d79. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHY2485884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc662f6d00fa074ab7a744e18eac175a86379e8cd8937f7700b2bd60f8ef72. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHZ2428757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c6fa8fa43f1b9cc45ebc4ef021e2a47b62364bb1c8bb68f51970cb836fba36. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCAHZ2447292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0238e6758d3b354ec828458966c9a0380a649d1f5163d16fb686b39e658ab3ee. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:59Z), 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/TCAHZ2461949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259b7194ec406dfb22df156ffcbaf6bde63c7b87ba2c38f965888e46b037607. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:20Z), 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/TCAHZ2491809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcc6444734c733ad2704dcb522376d1d28e01172cc3a961821d0e6c3aca2705. 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/TCAIA2434944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0ff6385a364b33a56de581c669a33ede64efc09c77a447fd255216a5bcaf8. 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/TCAIA2463057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca842d7a3b8b6a5986517e12ef779bb5f932269ef0dc069d35a98f1b311f7a52. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIB2486864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe533bb3ab67a38b67de5412aa4b992b7c78dc1556bea386c890bd0170e857697. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:08Z), 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/TCAIC2430399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db8a222e2e2150582a6be2f7e7dbc911293dd4eb24453df6be921b6416eadaf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIE2407632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef0e70e9b2e9a85f58504e75cd177b8114071d72cea5711fb65736a8a6b052. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:18Z), 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/TCAIE2403176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6891761c86d68bfd08fe7c56131f2019d0ee0da074cab2c9af3f1bca0e4129d. 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/TCAIF2411517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4354ec9382bebba34324e22d80c56cb047c2cbf3681621fbc3cf90fae4b60e12. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAIM2437838.