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 0x4b7ee32845a1a32acdc58487905e2be1422bd8567a2e1bdbff8f7150857ddb0a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea8ff396-97f0-4144-8e2f-7af123a67a57.json and https://artists.proofprofile.net/proofs/artist/ea8ff396-97f0-4144-8e2f-7af123a67a57.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 0x773c54d76c277dda0f884e443c39ec087352824538a87c22347440695c7f1d04. 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/DEY472379143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d672fb44e27c07fe5310a22a7e485e8f7b30f9ec3f24864458b70c45747781. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEY472379145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67a8bb23f19ec0413f53f3147160f3e66148e80e80b2f393b62deb6438a8477. 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/DEY472379146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb175986eb500fafae18762bfab5847390618e6dbf73a2902572bd9d65ab6aec. 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/DEY472379147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d9395d580f66478112aff0a30a768062ce635a96ca179fc3973ae27268cc29. 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/DEY472379148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a57424a9b7f015ee9efe4ad1576f9b7fa5f936a13cbddf37d7eb9439c55604. 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/DEY472277097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d331e47aff1cdb50b81bfa6ce26cf6b412683ed4419d47b0ff072c282de140d. 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/ZA1IC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e2346d3cdea8103b0ef71e471691c170bd01ff1f934c2c10411f39a953f15a. 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/QM7282453152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fd4adecf46d7a039fd534674bf022a9906a71490658415921c1374417a621e. 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/GBLV62137754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234808d173cd74102d2a42f05f9ffd9a14c8f163c90287163856675cf4e6a81a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62137755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b40c10f955fb8f50de7c1d5063861adc5e1d68bac627193e708cfa3cb5656. 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/GBLV62137758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fefe4ff3defa1ba44a25cd46b9b0ad8d7742e40fb1d5cfccb36cbc155f51b3. 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/QMFME1911785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6a70ef66c1990f49167c498bb3f508fe12ba10c4378f24c28b6ab764ba36a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME1911786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec9189770167f78932d09dadc5f337c3acf64947355df70e64a9ccf5115f6f. 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/QMFME1911787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c4950506fcd76d98dabf3a417df2eda9636499c91a2943b2b36ca969be2a6. 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/QMFME1911788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290f9bd96c64b37a2d4afe4b785db23a6f0de557ec0772d7f22293f6f6217e72. 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/QMFME1911793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5458ea8cf05a98e854635e240897e19936f9f6efc2d1d5d1e6f535ec2daec666. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME1911800.
Nothing But... The Sound of Afro House, Vol. 05