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 0x3b60f0299e12f0ddd94da9ab144991ec639810c8968005091403ca5e855205a6. 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/95ca9585-10c7-4a4d-8012-bbf1c24cbedf.json and https://artists.proofprofile.net/proofs/artist/95ca9585-10c7-4a4d-8012-bbf1c24cbedf.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 0x8c82ca57bba4acef795ad97e933dda40304c3f2dcbef216bd9087e061a0002b6. 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/PLH511200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82ca57bba4acef795ad97e933dda40304c3f2dcbef216bd9087e061a0002b6. 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/PLH511200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b07979a9940352c472122facb6f68e5764aa1b541d24f2b4ca832f3307d85. 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/PLF671301114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f32529aa805912490ad3399428eb44233cae2148c47cd9c1e08336f5c4e4bc. 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/PLH511200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f188a55c3cc167cbe05a7b44aad79ccd43ae331d7dab91f5d32922d595b511. 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/PLF241906275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3beff1148d75886754446e548237466fc320e1e4f2605b051e49023895ff97. 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/PLK561400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7dcafb6990422ba729f047932b3f5aab7716ffdff7ae79f43b75108095d555. 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/PLH511200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c82e2d4477c4bc6c43d438b97b93d5f26c60750f6057b4d167c80c0f6a7312. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACB1462274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d8d69da80fa6662fe7796e8159d8633fd750f923fba3772d8741df7c10e48a. 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/TCACB1462604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e415e6a2dcc5b6287c9064793ac3a64ef1f23f082363555680a64ceb10c46. 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/PL62S2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6afca385b937fc15a4c4a210a0d90bc778433ebf1f700f6d35bc98a664d5769. 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/PLH441200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31799d59f161cbff2d1be6029d7c27f7b060b43032ad097e6ad3033dcf792af9. 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/PLH441200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab136cbbafbaed4dd03b2d35ded1c6fbbc0018cd6b175bda6a375b7f48b95e. 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/PLH441200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204c87047f57cc7f9a9923d6189a33c9f6b8cd9fda508d3b7ee48cb6bd8a21d. 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/PLH441200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4402a95860f85376473708de26dca1cf19660bb1192c301b1037ddd4d9a8a9. 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/PLH441200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d508913e0453fcebc662af5b9cd2bf8dc740b8caddd3a4f1b0b0205dc8edc0. 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/PLH441200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96510d86e110a5cf62251d07771d5c5cb0d9807e858b2298643b34654394453f. 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/PLH441200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0169536224f8686245c6de4b1d5aecc44ed701a14553110504b1c6e0b85d6578. 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/PLH441200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db777cc9fb917241352c0497256f9b3c2eacefa7adf82b2c56a2cae91cae86d. 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/PLH441200010.