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 0xb5f54f62b951d0a11ae56d2067a2d7d1c300170b6cb1f2dcf0dd95feea3964a2. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4f30887-cefd-453d-b378-57fcdb2db8d7.json and https://artists.proofprofile.net/proofs/artist/c4f30887-cefd-453d-b378-57fcdb2db8d7.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 0x8e6901b851f11afb919c4ebcb387eade969399fa015ccbbd7fad4b86013bac87. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:31Z), 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/QZK6L2560923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a9e3827b7ac6fb2d4e7d7ff21cbb87d9e2bbf14db0fb54377b1c71cfc188c4. 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/QZK6L2560924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d22483441dc62372086551090812708ed26a70d2618cbc1fc24bda163d12b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6L2560925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e34bfab16f66676fb090e30a9dae714d3235c94060595cbc158f05a38aa13c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6L2560926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4fd886608b1517053c2173b597750e2d3f797cfa1b2148a83993123ce981c. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6L2560927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065c1e44dc060d944284979803f44d56b969f7dd1562c85e5a463abd8a755cb. 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/QZK6L2560928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6a7315060551e43f54b4967f11c200f207631a27094a6eaeb12cb6c860747. 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/QZK6L2560929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dbf169bbd0e8e0bb96cfabfc2c111a11e456c007274602293652f7dd3366aa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6L2560930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d24f33886fe4459d245f24975955840b57a21ba2f15bda02462ec63eeb988e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6L2560931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17721fdbdb88900a57a213bee3ca1d9af893e91a38fd7cf070e46b00b54fba2f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:17:28Z), 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/QZK6L2560932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3e1de9c2725886572cadb343a652dc2a76628721b06d1a367b045f161e42c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:49Z), 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/QZK6L2560933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150af886fa3ce110be37d1468adad811c3a810ca67e442d742d84d3861f2693. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6L2560934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcb480cd315891aa42abdc066527d7b61ad2b5b97c556b53fc5af62181e9497. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6L2560935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00094e39c3ef2a16830f4ff7756e4d7b7d8fb212e4d5fc6b8e1adde32253c4. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZK6L2560936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919a0035615a0eb127391bd5de9a1eac5b29f9f2d4ac3ecec23ab199ee096c9b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:06:45Z), 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/QZK6L2560938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6942c312341bf6a860381d42f548de365864c058c96fdc4f86d8eb249d512985. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZK6L2560939.