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 0x67c6a479d5adefade002ee421c19d779eb7a51399243f2c68c578a27adcbb6ee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5178a5c-377c-48cb-97ef-45db0cf76bda.json and https://artists.proofprofile.net/proofs/artist/d5178a5c-377c-48cb-97ef-45db0cf76bda.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 0xcea4e25f45a34dca4eaf68c79b4652a401f0723cb8cba9609f090cf078155c84. 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/TWA770600512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c94d6eef0c01f339ce4e0bd74eb8a894c10c53139647f9b3df2c782fd00038. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA770600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f3f60d21be590b8cc61634cac9b3e513ef661981ddd413821b0c63c4d5f427. 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/TWA770600513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6eda0d733c6235de6698f373a0a6793590af2b36c550d88cb6a5f8e1e4429. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA770600514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0299e920b9983cca5d93f8f10dee37fb94fbe06be7237a2da882f9969db6b. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:04:20Z), 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/TWA770600504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf391967ad5ff3f93210d7a77d60e9a42128f057a2c7ea9426abde8a4dcf7c8ce. 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/TWA770600515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5be8b0368b030931866ab27ddbf748579ec3be2632df91d5e2793c38313b6a. 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/TWA770600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93778e9fe4776ef6221b0c140f8ee6123a0834c981963eeb06cce6ba34d2d481. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA770600516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21cf748abab31d0b1b5765c12d3388e04e398f0d363e6be3abb2149d9c95cb8. 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/TWA770600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9c23247e213a99e05204b2a261e1580a4424230cad7d372af16b555c661a9. 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/TWA770600518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91177cc1d819410499ab04e9cf118ed4dc9644a3bdc809e2393cef2cf33af5a7. 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/TWA770600508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335c1f683703f5d97f29fa676ebbc21e8bfd0f5725ca45a5c0ee59a116a93dc. 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/TWA770600509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5af004b25ef641e2969eed666f7f4da7447851560cfa0949bcb17cf3e5978b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA770600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2c6e94c6b7dbd26b21071da766599532ce15a62392f19f20085aaabd293a5. 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/TWA310401907.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd9742b586f96e3386272814d8384ddae289896456568c813d6ba343362a529. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWA310401902.
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 0x5aa60cb96fb784b4f527b65430f0a60d9f4c72baf1b42aaafdd9664570e31673. 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/TWA310100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54119656c84155aad3086645f7ab0881e5dab34b9c4d9b96639b256d6b50e48b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06df341f41e6ccaa749548e48425c1de50350fea06eb27838af48911780c477. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc302b101ed2bc84f9b7a8b4c87313dc7636b2f26cc0f7d981533212624d2923d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b8c5a2ed7fce2b7d4ef0273df8daf083090d3d1c476a9d2c3b559d2360aa8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TWA310200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6296d8565a63ae644babc4566bdc72e038198d4ee52b6ecc6db72138e8e9ad. 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/TWA310200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32c65045b662d62f401c251ef77edadcd1c4251924481a85448c8dc4fa740c4. 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/TWA310200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d78b3912dacddc6594318cce21099527230884c2183c0171ab94687e923c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dade6dcd7535c4f86fdf1ca175e90b05b3e446b54a90032b66f93c49f1f9b1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TWA310200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdaa28c01a0e4afe2a2baee37fe6982c8d089ee7ee052f0260fd9ed6f3dd8d6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWA310200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35b8bfb8d377764d9409bf170c790f2c7dd7f93fb4dc4c2e15702b7f4ffa424. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA310100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a4a4029a7920dbeeac470f869328436e087bb1626c06b893e46ac1a91852b. 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/TWA310100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67b58d551335e8438bb1578179b61b5eb469ecc554c9af12ba2ebb7a8eb84ca. 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/TWA310100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea89406dc45f13c30cb53d7d69116fd80c7a86dd294f2d92873d5317466f7bc. 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/TWA310100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922b736f08532d1dd7d7ca045c8a4c39b83c98e21ad0dbb4d2fa4a5c8e431a66. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e99f9d5c50d85d92b813580a8d493388df729e161c88164774ce702ff9da8. 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/TWA310100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb37aebb320546e3b3b012363d1eb13d29c3e2c19dc975e54869d9298b409ae. 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/TWA310100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a05860b15d11917f0accfb09ed0d48d2e4a40fb22f850cb64fc3bf90cb222. 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/TWA310301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c243c616afdc6c1ec4cd8ddf3df4b5f69ef11c6ba408f2ce3b6f462096dd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185fcd6323dba1bfd97d01ca917ae7089e7de32f808c11b8cae08c4fff3188ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA170490308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f13caca6c0f1f1c938d6baef60a63991c60eeb40ca21e3b4319906839710673. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA170490202.