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 0xa3309731d79a149470659e973730082693201f554f598fa04d2eb0583b845fdd. 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/6e8ba46b-323b-4ffd-bc7e-f1c3ac68c1da.json and https://artists.proofprofile.net/proofs/artist/6e8ba46b-323b-4ffd-bc7e-f1c3ac68c1da.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 0xc5907486337c25e0d5ab1a972059c8d43bbb968ed06b7571e9f5269e49e62980. 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/ZA56E2201246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f77877e1adef838b3da90110c8ae7a1570b0869b2df0be1ca0295d791c8682. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USL4Q1702809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67ee474e0e6693e96be1ec2890577251f41d849047c3953195339a4cf706913. 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/USL4Q1702810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e3972984cccede8b18e345963345c1d81f16c49d561f85ac59cb4d14bb3639. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4Q1702811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232153d211243ff82155ac3d23ffca0c7e96a91d83f7cc29fe79339566fd6cd8. 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/USL4Q1702813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aaf5eca44c9daa1170c0b5f927ddd3d6ac839b558df0bb1b488d92d91a94c2. 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/USL4Q1702816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b5f32fcdd93b1a8774c489f06584e31c0b3de547c626853153edaf1a9d0ab. 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/MYTP11500619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a73c5eed7ff319080c0bb1108416f295224a59b71216611bd0f30247ec33f47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYTP11500620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1732e5bf80c2653cf18de36c5dfd86a06f12a1fd881027c951a32ecc85839a. 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/USHM22132206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28fbcde54ae6273576355d0c54aea9e2993835932dfd5e0dd8d3c14395a6bbd. 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/USHM22132208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ee36aded84f2f19ca9251153cf8c4a771af505fa9c8d1c3c575a3d58a8d7e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:19Z), 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/USHM22132210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1fc67556c5be54c1d4b6ae7b88f5fa961039aa07b59945105422ba08731971. 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/USHM22132213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db01f4e02c6479269f6c009f113a94cb2a394ba8d933576e8123930054a3f8. 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/USHM22132214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53acc1f437960d9b0d43d77f7133fab0ffbb865e4c9e506c2cf74b5ccb5cdc74. 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/USHM22132215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ce2323ffc944df89f80d7e29bbd7f5fafd8ca293371895b3234b9fd1243f52. 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/QZAMM1700097.
Classic R&B Sound: Studio West Collection, Vol. 2
Grip Tight Productions Presents: Vocals & Hooks Compilation