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 0x414b9590b7d6e38d293425b3a2965fd4930187fb1c8796387e39b50544100433. 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/550af704-8f11-495b-b3f9-453b70470b70.json and https://artists.proofprofile.net/proofs/artist/550af704-8f11-495b-b3f9-453b70470b70.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 0x487c998a841b68260d9d70af967d098a5c66dfbf0c96d6fca38a0ce5fd0c3e0a. 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/BCHY22300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea0e54d019e817a543aaf9033ae1c69c2be12367f4e2ca117eac45f2fce982a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BCHY22200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde081db6c224282a89bcfe170a28677f263969d5d31543a2e4d675ae359227ef. 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/BCHY22300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa595522c56e37190b8260fc9afbd09ce7bd406b58438061ccf1be383810bc1. 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/BCHY22300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b5fa426d0964471493b6a703a9c37d7a243fb85a3d23bc882de872c45a363. 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/BCHY22300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124b7a82d54d95726c6309db548907a355ad482eb301e56977112844f61ada4. 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/BCHY22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318bae76739610df3707c220d536bb07e33c6338561b7fa894797e5ad987b817. 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/BCHY22300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb11a4619b20846502590a47f3454fb9553c9716030ce9d2cd749b065c86181d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BCHY22300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef1cec032c4e1521ecd20f0629adb66c419c2bbe6ec92cf6a04023460c6b9e. 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/BCHY22300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1585c4d1ace01cc3cba268003e711fc8bab72c63596157f5cb00e6ea9b76b8b3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWDE2365061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f33a5e45881ff95c3113b291603c9a3a25c681d3531aa83673288ddf7686b3. 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/BCHY22300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96f9928af858fbce59df52562febc21945a44c94b1843e2fbaa1cf923688f26. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCHY22300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda3716468803cb1b58fefe1b65c0330f92d1adaa6f5aef252bcf9dd94d8d764. 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/BCHY22300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa098d69c93a4704c33244a69373349ae94643813bbf956cfe8b5ab0023024455. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCHY22300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87ffc83ee370ed199321f3f67681843ef2b4bf4b1694a588e2f83e97ba0875. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCHY22300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76064875d7035bac6e669d74a5cdaf6f749d8f8c82b22118a12a8de93592288c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BCHY22300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7aafb3b7927e648d73b8f3bce9efea7d19d0dd962b07b51525e80e05d2801. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCHY22300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f8621766fb1186e12bdd4c8aa0b6e55dcf17ffcbfc697be827de3163f3c32. 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/BCHY22300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173627180f543636d222e8649941b2545fd140cc6b38e2ecba0d6c7f060fb379. 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/BCHY22300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66cb2fb99c654c9ada16bb60539198ea9efe199d51a62ac94f4252b8d07fe93. 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/USLZJ2370977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb6ac0e8abd6a70b13c0cf71516dcef2b5fca0e8bf62e9a14f806f23cfaff4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCHY22300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd8dde0f6c2ae716cca2b1242aab1f255dc10508401d01d06edf80c3b0a79cf. 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/BCHY22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22082b1cb4f36092b765ec2125709fbefac7ff02d7932971c350116d64d86edb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BCHY22200014.