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 0x25b064a69f8cac9f423d3cc625086f9d386bc9e35da2a23ac9502ccd7212be5d. 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/c826de79-a1a5-4e1d-beda-aa380c93740f.json and https://artists.proofprofile.net/proofs/artist/c826de79-a1a5-4e1d-beda-aa380c93740f.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 0x4af626a147a561f95a3442bc273788cc92594da0e7c56659eb547209cadc2bf1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ57C1900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e1362d1c27b1698e9004d45df3c68459d2b8ff919dde41a06cfd813f3e5e57. 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/QZEQU2201994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616efec2767b572fbdddafb249bc0696f917011eb9abd57a5c608a1d9c74c90. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZEQU2255864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad7de16e780008d7d866486f89519c32e04f11e5a6af6c961e2fcfee14476b3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZEQU2267967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530468890e83065a1cc157e7bcecfdb71e4b2f997c984efeca401deaa611d786. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZEQU2268134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ca556940e5b1543666a6c3ececf2e0b2e9ed05e6bbf6ddeb51ab7938dfeb1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZEQU2300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056c4bd1a11d73e730659caf1aba0887ed3ee70744a41b7133cf22a2e7624425. 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/CAN112400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59670eac3e6b1b07d35f5999bacfe6e73c86ae1da38b045947c0c081418e89bf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CAN112401415.
Eating & Drinking & Being in Love (Intro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d73bbdc7121a7bda60a245487c2fcddc1af58f670310c945adf77c3d600b0f4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CAN112401562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4786e4a14218ccf29841dbdc32a8c7256519bd4b723fdfbaae98da301d893fcc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAN112401563.
One More Night (With My Friends in the City)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e7ab72ca78d36faca5571a14865f831684a162ac7e25e8fc8d58ac3a0a245. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/CAN112401565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bbddb2c3e2e2d171ab5214ea300931f43d95a40346ae17f74f48116e2633d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAN112401566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a7a6e6fec67930a6d20c3c0708ef224dae4d2ea70195acbe2b5f8deea9023b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAN112401567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a29d6425d8bdc13aa748899b9ab2c1ff0343574eb33bc1b52d32b32848e8c49. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAN112401568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd713d533390f59dbb8bc5ed55f754e30d456794789df0d29d484e55bc346c. 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/CAN112402493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424842a67921340be1dd34cc5fc382f80468426350ec33e9f59566b1870a0bac. 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/CAN112402323.
Eating & Drinking & Singing With My Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424842a67921340be1dd34cc5fc382f80468426350ec33e9f59566b1870a0bac. 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/CAN112402323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd713d533390f59dbb8bc5ed55f754e30d456794789df0d29d484e55bc346c. 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/CAN112402493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3aac960ee1294a10c75913e30d921f3b3d66e51f36ffb8da7b68db1bcb4f4. 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/CAN112500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc795daa2c29a98e23af2f68015af0dd7e113765b1f452ea71a950b3daca55400. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZEQU2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59670eac3e6b1b07d35f5999bacfe6e73c86ae1da38b045947c0c081418e89bf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112401415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff251f877aec1e07a2f58dd57db63909c1c851c3774deabc00864ae678369e12. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAN112401564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc795daa2c29a98e23af2f68015af0dd7e113765b1f452ea71a950b3daca55400. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZEQU2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59670eac3e6b1b07d35f5999bacfe6e73c86ae1da38b045947c0c081418e89bf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CAN112401415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056c4bd1a11d73e730659caf1aba0887ed3ee70744a41b7133cf22a2e7624425. 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/CAN112400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff251f877aec1e07a2f58dd57db63909c1c851c3774deabc00864ae678369e12. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112401564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a67159a6ff51ed3674fc2e917db81af39bb3242debe30a6f1e2e83822835ff1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAN112500648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15166924a9655cc942b480fd0afb05d97a05f6e8d5eadb5e5b8033992ec4b0e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CAN112500649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e7ab72ca78d36faca5571a14865f831684a162ac7e25e8fc8d58ac3a0a245. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CAN112401565.