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 0xcc99435b32ffb1734b3f03ae6f1fb87cfa7c62d5a98b851bc55d1d5b93c557a4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8347e09-f78d-427b-978a-3be60e6c6718.json and https://artists.proofprofile.net/proofs/artist/f8347e09-f78d-427b-978a-3be60e6c6718.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Angels We Have Heard On High (With Marvin Goldstein)
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 0x44ba5ea265b67407a9656ddfc348f26f57b60e1a64670ed3c9cacecf388cf984. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USX9P0702514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc044b9e01b7202cf08cc82d161543845b8799d540c6e5d132a43c095ac9fea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USX9P0702524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f9760548642eefa924f26a570bd46132af66d519d3416d592b4239b9cf0afe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P0734358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c7d4c77c9b4a2dc20ef12707f3eb11c2ddd5b63d02ee551a625ffce5d7b6f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P0734360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75e615084eda54827ce62733dc29e8f3693470cbb9d9764e7fa5acbe42bcaa9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P0734364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb7b91b7488dd3b8357972973e2638ec3c2c12cdf813ca6edeb60263fad2c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USX9P0734365.
Christ The Lord Is Risen Today/ He Is Risen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801bb0ccd3b3940b1030c8e365c9f3cf8e32859e4ec84cf7a5f857541b31c920. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P0734366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd9491be855378138bf4483f700488a1483cc7ac8bd76daf1b9ea756337cb4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P0734368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9223a204aa416e12a31765b7a7f50a6f81025724e320954a32f24608a1088a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USX9P0734356.
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 0x70f13ad701c6ac3ac0a3eafbd3f766cf1da62621e7a30603ce97095c39034798. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USX9P0734357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c896fa69a7ec063b189177de14b3fba31baf7a7dbeb03317c1af7e926be4810. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P0734361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d8e1a49d6df063bdca36877c1014080222f9c56e49e6cf963aaa9fa5bc9549. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USX9P0734362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba6c25b91a250334505891318fc995edca84e03a118ef07903989d3e4acd9fd. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/USX9P0734363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae0218f318ad3925cdc4501c937924682365b01ed11e8fa2d31202c9dbafac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USX9P0734367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d859c815e2fabebe541e4cf679002802498c937d1422a4d434b1a5b79c2be. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX9P0720872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6ee1d1f15953d1fcf8f8c8c8819ca3f6f1c8674011146175df2f22d678b92. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:29:31Z), 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/USX9P0720876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe093a584554eec30428c12f45ba5eb511b4f09ed98f94d12985e178263c5bb1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P0720878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605e42a3e4c0030c6ec752caa62d73313f69ac46c834e8c1fe8c405b9221115b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P0720879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff07e6a35dd43ddfbbb7676b4a9ac24c405cc45d0cb9f7bf3e77b468b14bd2. 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/USX9P0720881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e478d694f77219cc16c7a46552329e0bd905b3a261de630541594f511afddf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USX9P0720883.