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 0x51410f0570f74bc60447f6b86e3cbc5c5e66e858799e6cdb4e3b9ee97f5fec22. 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/2be33167-2e7f-4e56-a921-293b4e8a89f6.json and https://artists.proofprofile.net/proofs/artist/2be33167-2e7f-4e56-a921-293b4e8a89f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Stan Tracey Quartet With Tubby Hayes (Live)
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 0x73c5952c0f09f55ceacaa2e3b1ed6142fe0e0c208d6e57be03ede384ef362c66. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBYGX1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036210687521abf1ccbf0863760b3cfe6e4ddabf4e95fe857744532bde5456b. 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/GBYGX1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571523565cec3c14e8980025e4b5aac74ab591828f0d6ad4df9e8941e5ce3c9c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBYGX1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f90e5337b534b8bd512ceff81e7add760c1166d66d71c3deae63d96662cc6b. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/GBYGX1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a2b5cadcdee847e41b48b7110d04f83845e6d6ab7c71210be766bd3323aea. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBYGX1000008.
Classic Tracey, Vol. 4: The Stan Tracey Quartet with Tubby Hayes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8260a8e9c1ad9ac6ede1035c6df762392f94ef4b02693441a24ce464ba71beb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBYGX2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158ad6ef4a4e468a6cb5249ee7f3a8058d113d499ad064cef61956fe0f790de. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBYGX2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced924120bbc6e8d4b7b6049a28c22090b9144526e4cac66a22584a1d967d4a. 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/GBYGX2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e86116a94e2de5bcd68161723420f24de604287ccff8a787b7b41a92affebe. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBYGX2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029d6d229652cbfd5eb4734ecfac63dfd5a7964921db0c9250c007321d590a05. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBYGX2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e321bb672041f1376672b8a1e8d2c12e61cf2cde02d64f4f6eef5a601b171. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBYGX2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aefc7d5db69d54f108b423aa239d025b5483b49a89d50d41b695a6e51106ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBYGX2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20dae784fc5c0cdb64dbd2aa301d884b700d688b8980aae79441e9240cf4cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBYGX2200016.