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 0xc710be3c1a48b505f3cc21d7be7e50f5374aeaae8ca85e2b2320550550f1a037. 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/e3fe2e67-64fe-490a-bf88-9f3b81e0de02.json and https://artists.proofprofile.net/proofs/artist/e3fe2e67-64fe-490a-bf88-9f3b81e0de02.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 0xe5dac4892aa3b4c5730e39554f1156339f74b82c051a08edc6bff3540dbe2357. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/UYM121701076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60f6c0b5441c662929de594fa3d32ff013ceafb4a71d0e4808fef0599a88de. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/UYM121805253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c23e6d145989dadc8e7de5c702f4a9680f76852d4804e58937c21c627c94823. 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/UYM121805262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a53cbfc5049113c2ea4d7d88e8666a88b6d96dbc62a0fbc9b251b09903c839. 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/UYM121805250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0fafed23ddb5c2fab4b5412387bd03fe42d8b78636200cd447e3d9e16bf819. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYM121805257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb96d1fa46ced1de0530f8dcc06dd5eefd9d4b382a8872d6d6ecd974d0b36a76. 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/UYM121805254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde150b4b4814e530b232dd86404352731f6f757ab9c137d254f664440d0db270. 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/UYM121902906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0e57536ac0698ec5d831f9adc984de442adec1d3e85061d0cbb27d9a5f1c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYM122002472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b2819d28e2ecc63baaa0089fbc67acefb9b678f048b20106912d1842427c67. 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/UYM122003374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a26f2d53010f02851660370a3a7256e1598d230629d8e520937e7f6e2a4d3. 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/UYM122104491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef1de6eff127a8befef9ad4af7a6eeef09e78883ee8815b23691a153990003. 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/UYM122200952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c1775c9ce9e84279ddbac79eea70b4a3497b5238257b18ea23deff50456eac. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UYM122200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1732724712eae5ddad41492629023df8676c2fac7f8e33322bf8c4e763233f50. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/UYM123000936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45806f177f5807dc2f0287515554c80fd1538b30a883a173e0b6eea3b264584. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UYM123000965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dae5f895bac91f70f79e5caf2f7898e679a624f115c1a6aeb74f6398391cce0. 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/UYM122400756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83661ec3cbe502fb7613aa2274c988deefa5eab48d79dca31fc41d3047451faa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/UYM122500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f6ad4e8a96dd94798a0530ede24a853cde3651a3f3dd9865d90b6749f8b3fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UYM121805269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe806a2db3d5ae7abde0f542aa99f748fedb85553e290a218eac2395572f36af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121902067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aca202478c16822b48168715979b5227afe6e261d39bff490aac3a529a94c1. 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/UYM122003777.