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 0x4e24ac97992f41c689fdd613d64ae493cc1b1e61ce20d2c0c11802d9e056bda5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1405ff41-2623-4484-b29c-ce88a3ffeb4d.json and https://artists.proofprofile.net/proofs/artist/1405ff41-2623-4484-b29c-ce88a3ffeb4d.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 0xc51852ee0e8d39058a8bd16f1cf07463c39b863444747c4ff4c460dad16c0a4f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USM2C2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72dcce19e0e5c837ea7e4159d4e0f8d58b6237727ba12d7ac1b0cba5ee839dd. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USM2C2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a800b7d2a57453222abb9ac975646a50ef4e863c441f0259d019f12f45df6d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USM2C2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb803deaae73f6c88d2021e7996f2aaee6579b3ad9edca035e200554a7c80ea. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USM2C2400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51ac81b60e4a5da92d37123c0965aea1a8c1a430b545adc78fa359457de42cf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USM2C2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28123bbb702cb4defb71d7d100e9639f5a81fda38f7d795c89066891b1708732. 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/USM2C2400801.
Halfway To Your Heart (Basement Sessions)
Halfway To Your Heart - Basement Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14ac5411008b231e5e400582d7b6d50858e8ec1d81db1ecae92a6bb20467a3d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USM2C2400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28123bbb702cb4defb71d7d100e9639f5a81fda38f7d795c89066891b1708732. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USM2C2400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857b75c1d13162cb60f2c9eb24f911aafb72fd25fa90bf05a5e6f8d041864fbb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USM2C2400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28123bbb702cb4defb71d7d100e9639f5a81fda38f7d795c89066891b1708732. 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/USM2C2400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b21b03978957b26b81a29fb1788390a56c91b954c64f50fd1615ebfab9e2f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USM2C2400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14ac5411008b231e5e400582d7b6d50858e8ec1d81db1ecae92a6bb20467a3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USM2C2400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96da3828c6a5083c79535463be1cb3da200f2a40971157d7b955f0d955ffce2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USM2C2400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9af7729a2794e5dc7fcb7dab234122c9085361a656a1750e7860a105ef376. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USM2C2500505.