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 0x42c5e363a90f8d74b50725719be43cff3d6e6f4f7c24117db352bf709971677e. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fb6f0eb-8025-47e3-9e08-631a3b761e36.json and https://artists.proofprofile.net/proofs/artist/6fb6f0eb-8025-47e3-9e08-631a3b761e36.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 0x4c35c2394ad0936938ddd5e982cb3263189e61bc76b49a357d96a922377ab861. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM24S2102763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b72c2a358f830b4dddfd0e34db3e7a3b2d4bbd869f983b5108eb65346db09. 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/QM24S2102764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96617c4b98b4c778e42f91b09d7c6e258c31810a875d87fc1fdabddace317a4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM24S2102765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a6e1833de4a1139da60cac4d516ad310e25f63b5e5a36514f49a1dea06add. 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/QM24S2102766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c3cf3f59ea61055d051f8831bbca7ae617a03e78b305a6688af25bee5adee. 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/QM24S2102767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda9683c650ac20c0afd9aa6d197fe98cdbf28da4d2d558da5501ad20e93763. 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/QM24S2102768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9cbc32f5fafb77954ecdc5ec007dc5c22f2d823cdf7d3e438ef2e90da62e4. 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/QM24S2102333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57701b1a1b39ac389d794aca5df30510a51d4304a1af490343c9334356af7c8. 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/QM24S2102769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d71f215843f28cdcbbb35ca24e284b475f283004a08ebf31271036df5f7e3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM24S2102771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c218cf8e0938523021cb2de962337e87cddbb5f2b63ae28ee544a2ea2f0b7eb. 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/QM24S2102772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e607de58aa025cef7130cd1cdbb0089017d75c93eac3e4db2c2d8cd0e3dced. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM24S2102773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583fbeec070e6226310d89583e87942144f9ae3d7c78435df65f238aa5f7c49. 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/QM24S2102775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654788c16436eb683e85628b4271cbdc039b6c773795dd2523ddef1729366a4d. 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/QM24S1927262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb612f2a44c0e414bcf8e7eed92f4e23bd232fa676c05dea708315d80d933b. 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/QM24S1927263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6009bc350e5646e39ef1632cb96eb29013ec80f4ff10966c8d834a191c11b994. 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/QM24S1927264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc429f9a366addcc7ea20bb080c43f4148296270a3d98b641ea3745ee5dad6b2f. 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/QM24S1927265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e1a8f5fdda0e3ffc30bfb1a65e775e3aebaf79047af63631d2c4885b08fcf4. 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/QM24S1927266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3987ebbbb242ef9e0c81d2349918076e80c4bae220fc4a4e52638a4521938ad. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM24S1927267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64ec8a4c28d1fec3c21d1578aedea444d1f3402ca78856b9f08313c0d189ec. 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/QM24S1927097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa56de8bf92874d71402b55449a9b0323f3fed3db66cd523e926ca6455a0575. 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/QM24S1927268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ffa3594375182f66cf7a4c555fdcb86d7eec036b5b30aca82346b5dcebd907. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM24S1927269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c86ab1610484fec3e2daf2a0dbfe917c942e9039a33fdbe7eb9d4ae329ac9a4. 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/QM24S1927270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f9a681aaa475d15c1635df86d4918e59519f8ea399f42c71924d77e5a78887. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM24S1927271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a6ac3903efec95c7d02bb849cc5f57f83a4e6dbe6d93cadbbb4854e655111. 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/QM24S1927272.
Quality Control: Control The Streets Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c96a7985cee610cfab712f90b981d893bab7a8d24cf210b32ae249760ce05d. 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/USUG11902829.