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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac75564e582f703b865d5c41ed84b42c941bc45590c4eb171a55e4b16da07f1. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18350db5-831c-4ab1-8610-5b3953699001.json and https://artists.proofprofile.net/proofs/artist/18350db5-831c-4ab1-8610-5b3953699001.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2564634ba4ed20c8cf48bde4eeffe5d8461e67bd9eca2c91c5a2c4502334bd71. 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/QM6MZ2474786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde52e41b523aa987ad01988aa7a6ce1158e84ec4de06bde3911584509275065b. 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/USBWC0610073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c0b94f7871fa27122beae42aaa5877dd9eaef8f4f52085c61f74fcfac8615. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USBWC1600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934f64c3093320717b4fb2f8ee7b427a7c9353f7a307f805cf865d952e59b91. 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/USBWC1600244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e5c97c4f6a6a588fb22b330f01d1611740243d67b1d58b79f4daba4d5b09b. 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/USBWC1600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f4a4dbdb82e607df7d8373a844b9d0e13c35ad44e21f46617e7dbbfdbf527b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:46:32Z), 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/USBWC1600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded485a80e8d17516cbf46f27363af4b7ebdae66071c18e002e72d4fef724bd0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USBWC0610072.
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 0x18ca0fdad32b27ec1159fa8da39c2159d34e0c0736b71b1ae747d6be0d5fd7b9. 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/USBWC1600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e689e5632490bb812a048e216395b766ea3130bc3461da5815ea60ed6760bc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USBWC1600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dfc6c2b8e3394d2c0ac79dc26caa5275c8903296219b0b98a8aef915bb488a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITD541201880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc7a6f860283fcb85cec590cee6aecf593d7da3d192ad0a9156ae0984056786. 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/ITD541201882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168541f5f3c92d32f2e61e13d10f6473cce830d425a0e598bc566febb2361f27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITD541201884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ebb8f45d42d4f90a47cafbaf4a885febae22f54664195cd0e53d058bb327f1. 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/ITD541201886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3547fab615b8809e5e9d8956875e89a4fdd3f77990e93f60d06d6143dcfd2b8. 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/ITD541201887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7658678ca938f07e5e2d77aa4704f798f71b657e4c3476e883a0de4c324893. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITD541201889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23abffd23c3eedcaa5ce6468c799e8d25a6e7374617c14534fae111067e0575. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITD541201890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594a1d099607c245a1f8b7c1d31870def56db03fb0504ef6bc4d00b210cdd77d. 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/ITD541201891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790be4822526b134636b9c00d4072d5faf4533599524f2ef7f3f285d7035c0f5. 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/ITD541201892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374486c420d978666ca4237e251e767bb98fc27e1013d47222eaca444afdd7cd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITD541201888.