The Dominican House of Studies is a Catholic institution in Washington, DC, housing both the Priory of the Immaculate Conception, a community of the Province of St. Joseph of the Order of Preachers (D
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 0x0b03913a75fafb05f3880ddfae91413cf649f667997611f7e03e34a6627e2bea. 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/3f1a1ece-4ab6-42da-8a2e-60828a43e31a.json and https://artists.proofprofile.net/proofs/artist/3f1a1ece-4ab6-42da-8a2e-60828a43e31a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gaudeamus: Celebrating 800 Years of Dominican Life
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 0xd4fd7ab4cd3288e0c0574fd57e7af1c3d06969c04bc4b82d05eb84e13f2666eb. 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/QM9A91526816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb04c001ced6523e9958e7e9fe3de32388a967cf56f285d473bbb7c8837f0330. 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/QM9A91526817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4b1844f7dcbb28e3950aaf135c07097423891d730ba559b9772077ba9e83f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM9A91526821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae0ec5fb2e22eb729bc6e307fba4e040274595e0dae3692a927da0654db8819. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM9A91526822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ee9b92a70cdbb71aa2ef4b67282d31a09e335ea89b933b4571e6630fd57562. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM9A91526823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6d6423c90ff1b0ecdcdcb2c769fdae83169eb6a226989e5b2e94cc66ff92c. 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/QM9A91526824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea1894547bee4723178a7eaede2ebe142697a5fbf762b1f45332dbc4a93e95. 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/QM9A91526825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a8443df3dfba3174046c3eb3f1086704ea34c498d74782f2c2aaaf9fb6e173. 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/QM9A91526826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27175b939019fa61a518cf54d7593fa068c9338a85846edf27ad7b0b98f8075. 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/QM9A91526827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda60fc782893bcafe508b0d19449cee632d367272a8d069936b566471e6a0542. 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/QM9A91526828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f50676f2093c2285767da82d9236750cf8151575cc6288dc133f353f46d0564. 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/QM9A91526833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aba7b79b06a1f6db5a289af142eaabbe157a7a5de98dc49a0fce5b675c44e3. 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/QM9A91526834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938782650c2382d70d973f08928c23e19b943f40e904602675a12308529e3e4. 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/QM9A91526836.
Christ Was Born to Save: Christmas with the Dominican Friars
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