1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x821e3ccd68776ee6376e5b809e6bbd31f6de2f1eae3c393e26ea4d3d07e17558. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8310f514-9c7c-45cb-b10e-0b07cdff6036.json and https://artists.proofprofile.net/proofs/artist/8310f514-9c7c-45cb-b10e-0b07cdff6036.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 → block OTSBitcoinBlock must exist at that height 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 0xff7c1d2e814203b7b08040ddd3b907851a2947223bf069da398743f74ca8dfb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USBS50711495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782f8dbdcf915a305a018cb14a7e19c7e09aaff8cb5383a060684d2896e6dd8. 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/USBS50711497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f19dbe556d8a3832f8b074fd9872ed023d23715bd708309c913ddbd89e2cc3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USBS50711498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88dd3e870312d206031350e86fc5048ae08cf8a312a6ed11cf64404513ef8b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USBS50930952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42d22c1599b6f1fdc3c323e7beea9c2d05374b1df2d02576812eb6ea5ea978. 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/USBS50930953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f226533acb335fe11f5ed1bbf02dc76dedb54de69b927343cc86c3046622d63. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:41Z), 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/USBS51131185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e239c10e1b729fe40ee13e7c32c85c6e2c9e8f078ca05d67a86bd7fe7c0dbf. 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/USBS51131186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cdeb0ef4cbae3545fb26578a0803429be2eb77708a7ce71e75781cb1769b4a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USBS51131188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594085f30a3bbdcda9d92762626b53e54f6a245d0dad4b5a48661f4912decaae. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USBS51131189.
Polyvinyl 4-Track Singles Series, Vol. 2
Interview with John Roderick (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07376d61baab55e0f1244cd107e3b728ae2efb154dc0bba4940cf75b768b6de. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:23Z), 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/USBS51500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd12986833c8cd0e4f050e04f2bc79cf8054ddac1afe2e574b86f582b1e387. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USBS51500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199c7826dfd2dc35c5c470baea74deaeb2cdbb80927234114f82426018b399d9. 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/USBS51500158.
Say It Isn’t Greensleeves (A Change at Christmas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b56cdda05867a843334ca8b19947dd4a39f3b42bc10a7a2de395a941ba3ae1d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USYRG1730002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35cab38de67c5bc26571a76394b8b1e430c0c26d5c32ecfbb39b0ae6f5c88fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USYRG1730003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec5eb2d2a6d305555187f3a7693ea1f2cd627b3e2f451ec7672361999b9005c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USYRG1730006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49af267655e3477db103b77fad21fbf04af0cc2279604af02696f04898a8bae4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USYRG1730008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49e2bf9aca5595d52f3d6c463dbf79a084288c4ec5af24364d840c168a07156. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USYRG1730009.
Devinyl Splits Vol. 2: Kevin Devine & Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002dfe40719d7a6f812c31142fa5ebc1478e655aa87365157855e4b726e75855. 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/QM87M1805001.