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 0xd05b7ffa874241597b84d7cd3f62f1213f6b4a319d883a625b10bf27612ef5c1. 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/459a2b5d-fddf-4231-898a-f3c9c4fc7c57.json and https://artists.proofprofile.net/proofs/artist/459a2b5d-fddf-4231-898a-f3c9c4fc7c57.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 0x3a07fdaba2050970b649910f2e71bc9c57e6fb02518e7d9fb754c9322d4cf387. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCADJ1756078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b74f05650672bbc5da2e642d848f41a0f658789ebdb584fb53496feed4b09. 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/QZJRC1927021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ecdcdf389412d56038287fc14725357d0762abe4adc8d08730f0bb55d506ba. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZJRC1927019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9a154f55a540b05ce6fd845d8e003e3cff63c9f8526f64dc2f4ef0a610da4c. 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/QZJRC1927020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c8a20bd82d13826fac1b54da4910be633abaaef260fcb33c6786fdfbe7e4e. 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/QZJRC1927027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eda82a8d62619c5b54f11355e2eb96593e4b64a6428baf5ffdd326453641f8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZJRC1927022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ecdcdf389412d56038287fc14725357d0762abe4adc8d08730f0bb55d506ba. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZJRC1927019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9a154f55a540b05ce6fd845d8e003e3cff63c9f8526f64dc2f4ef0a610da4c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZJRC1927020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f4fcb2b55a8f734daa08c68afb6f49c7c1b98256f2af48bff3d548c1b63879. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZW9M2221856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452bb1c838f4db81f61c40b57b5465a582738dd39cb3c87b6660399a344e1cef. 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/QZW9M2221857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14afd0ee08e9cf9d08ddd2a54c73eca1a5ea8d0add9aa2bc29fccdc703c192b1. 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/QZW9M2305366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136130a1a35c8efaa06bc9641fa5aa11b5821adeacc68e5619f5eb154792ffb. 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/QZTV32505789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3581dc98ca20d4196c7bae69c58b0e1424333900651f86224de092b105c802f. 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/TCADB1730827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc384bb3773159f8e0b67ff142e4db585a3af1942e8edb982a4b27a0e787598. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM99V2503601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7d983064945cdaadc59afed7e9952334e1d87e4a90cd0e78cdc0e06aa550e2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM99V2503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0115a1865401c5d513c0f6fb16c153ddb842c2215d3e073063f6b40fbffa02d9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:24:35Z), 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/QM99V2503603.
Business Solutions - Audiotree Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ec9df9d747199f91e583c6b9528b7d2578aad74333d0ebc9ca133a8b8fb44d. 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/QM99V2503604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e027b5d856a1b3beccd7a88a74eb2eba1c2c55cae48c8ddf130d54f6881dba6. 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/USLZJ2418648.