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 0x6b1c45d44b997fef963b926f50e59e79e3e8b61bca5a1e0ababf1a0124730432. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62332028-97c8-421a-bbb4-a766a05b01b5.json and https://artists.proofprofile.net/proofs/artist/62332028-97c8-421a-bbb4-a766a05b01b5.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 0x1605ee8e758fa3d9154df54fd6bdd19b82bd5b9512baf8af73c43909c8127623. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKQU2024906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a48bf958b33ddab709d018bd6d88dc586ee96cc0c9a43aace891cb4b49c729b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU2024909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda9edf3e4b24c37e7717bff4ff79b7067cc90d8aceb88bc475d2947687332eb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US83Z2342945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810bdceaca88915038c298cb893bffff8977d3fc29aed9453a7d50ed169117d8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US83Z2226305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b38d8b4e899159feb8057cc828ff03b6ccdcdcfd1abfef215b62f3202f039a2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA42205464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4129a38d099035e7be196dbb47656edf3a36d39ecbdc80eeb7bc9c811c25dd1f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZDA42205465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d721cc31dbe1264ca9a2592649b51834ade834279b1103d51f4c56e03e5e46b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMER2234637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e06ffa963c2330134dc23ee225be813fd4db53a065015df60ec08de59025fa. 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/QZMER2234638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9757ad733910c9664874343edb9a7313ab8b265190d421669958c7858c5bd3e. 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/US83Z2238359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee0144c53e17ee11be6eed5b642d5cdd08bd978e9b2da8e57f026a603762c95. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US83Z2238360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af504a33db8d31e0bf74df771d3c0077a1b23a18079232afbb459ac8a512a9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US83Z2238361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3092db467e180fd8968992a98c7622c9ebc569e613bbcac3cf49c170a00631a7. 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/US83Z2238362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de87b84816a9cfe6ad9478cbe546595da9c1589de5d313827b2e2e4f7f5397e. 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/US83Z2238363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5e10ae91adff873479c364ffef070aa893095ae85db8c0e080df4e0d61834. 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/US83Z2238364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea40e5dc4c4d57047af538ea6b83bde0eb10a1c8baa7bdc39c7ec44dbda2cb8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US83Z2122711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160d52b740928df424703e27b856cfef22ff8ca3c0a96d30125f28029bfe7520. 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/US83Z2122705.
Montreal Madness - Unknown Concept Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95991c1b9be20c9c913c335b1b0ef272c3a161c5c40ac02c86bcc5fff1431bfd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US83Z2122710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf2f9cbeda25204fc9169182e7e704c15f8bc6dda4fd0566a38e9977161adf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US83Z2122702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd9abe1ec15bac119cd940759df4cf3fffd6fe523311010433947b2b7c58467. 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/US83Z2122709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1239da0f12fe621a6bf58d75fec96af7141fcc431fe516813f6c8ce14573944. 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/US83Z2122708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951e1b62c1d754c23a88e44c1ff0db1c3db202a069c81ec0de04c4ed2b510b8e. 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/US83Z2122706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071c5574443ab7c093bc3e17781aeb34c6d3db64971d902982822e7793d5162. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/US83Z2122707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300d568c81a317f61f83157281ba8c204a8a9cede391012d74f2ac7516ee3301. 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/US83Z2342942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e7d67a85f8f630ed734d509e1e3830c9467d3df5005bad39b0cfa8c7821324. 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/US83Z2342941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd35f2a2e1c54bf64a84f6384ac7acc0222038692d6ba55e57bad561aa02957. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/US83Z2342943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda9edf3e4b24c37e7717bff4ff79b7067cc90d8aceb88bc475d2947687332eb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US83Z2342945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86054279a3b700cc9bd396e46430818b91aae0109971c18e7a0e5a50e5397be2. 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/US83Z2342944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269ddf81a417ca270c2bb99027d587beb3e12e02b1e4549d2a12299163de461b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US83Z2342946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414f6b038d7e4f1a88c69d93123fc810c996354c02b84f93aedc9b46a938a7b3. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/US83Z2226302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8cec54c2c5dddf34581faeba5fcc4857df35e67915055f1ba61703c409ea9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z2226303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb25efda3ea883b89efddf13f406974f0791d71418ae62df33b45a777c7413f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2226308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f186903e34d808dec7f368595787390211594c5d3a0d109b37eca4b080b4a49. 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/US83Z2226309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6449d03592583e5f2c920d8c3b1f8f8e1f588db6f28564ae2091ea846514fdc0. 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/GBLV62010841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceccd431758d20633e3856698a9449aa54c46db92287bf219fcc72ca0d8d67d. 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/GBLV62010842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20cda2ef9bd5557b33f9d2d9241847626120ffd1c92d39ca764af0ea127c6fc. 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/GBLV62010848.