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 0x85d68c31328a350d63846087021b0fc604c9523d6474477ac23caa1235a05ed3. 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/0acc468d-6c07-409e-9807-ddbb3161a94d.json and https://artists.proofprofile.net/proofs/artist/0acc468d-6c07-409e-9807-ddbb3161a94d.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 0x966fb4fc7f67a4719332632f151ddda77080adad4abd768732c249bed7ac2eba. 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/HUA521600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c877f4e5ada684e6bb07a641a8e845da5287fc43d20ea60b72d811816e76969. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/HUA521600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875328d446c63a2f50682685fd35fe04f3e33ee4076ed761ab9e516a791d35dd. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/HUA521600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc792e7c29009c982e1c357f4b6f01c3cddd765af5e465dbf9ebed0f0d5d66. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA521600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaefb9cc227b0adb29edca4d693e43dd83b584ce8f6b2bbd89ab1f4ea8ad368f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HUA521600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ac835f1c38ac65d301f43817e96b12dd9a353c08dcce8ce6aeb810dfe640d. 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/HUA521800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdfc38cb97e84a3f1d5f06eeb08e56761729c31be876fd3e9d2b8468cc2799e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/HUA522000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6b281a16626c70463abc671f6fc992a40d161b8d553b4c1c777dbbdae80d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA522000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60823ca7a8ad99c1412d354571121759caed916fea4ef4d083bec83143eac78d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/HUA522000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026246fb1f03187b99cc5cbc55ff65e6d7b805491768696fcfce629039ffc2b7. 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/HUA522000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fee9e1afdc081ee067f78c924248de7dbea20c7b170c2df07d8e36ad87ad2d7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/HUA522000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2096843399db3bb67a6653186317e0ca08b144caf77d2b6dc1a35ffc39fac12d. 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/HUA522200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6869720c72c41e70cc0bf3d1a5f3c445f51aa75892f58958039a4a19d9367. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUA522200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314655d574618dd2d032a461749b8ed7aa2ebd3a6b1a1939f352fe305db5a244. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/HUA522200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fa53b15d3274e7d0577fe9bd1ace61385237f61c46567c520a0ecfd32b0c72. 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/HUA522300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c55b21dc6ca3a21bc7e6e31f449f9e115197b3b46385cbf924489104c59ac14. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/HUA522300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6831f74424ff85a6c14ebc16b18b254bdec973979d710fa4a7e157482e162ac8. 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/HUA522300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597ab386937360b00bfbf90535edff6728c721aa72f6ad09804b05a998aab4f. 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/HUA522300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d9dcc44bc7ecb432b595779092c748201400605d734800c413e460363140ee. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/HUA522300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6485aaaca0700a0a94c10599f2ae7cf61a4f4bc7d34eec810ae4fd9ae64b8ec9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA522400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b46f43d36c1a7fbd8ac6edce89901a98a7190d59ec5a253978b4fcaea7391b. 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/HUA522400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f723e6d001007139a391f1c8e4a219ab8c5a4b2f2ace48875830cfc73e905b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/HUA522400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3323bb03d758790ad271ed99e6d2ec26084b9d8e6a5c2b20951c4f8793b4834b. 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/HUA522400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92cd4f18141459a3131f2537ff2c14ba5d9a159c6e9281b12da666b37da44b7. 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/HUA522500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44acc439b9f8f43ec1b5d260d7edfb39c5493db43937bf80c2d75146f137133d. 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/HUA522500005.
Punk Rock Halloween - Loud, Fast & Scary!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9519d23807761b95687da9504774b9bac891ede49ea8c004235fd165896711f3. 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/QM6XS1704685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86661562597f6eab981e06f2ea834aa9985d338dbb29cacdf25a824d9d2ee1a4. 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/QM6XS1575729.