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 0x1984d002a5cfd6384480fe480ec97430bd49446310ec8bcc312b97383faf508a. 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/bcdfcee0-9be3-481d-9a2f-2713f5f1bd73.json and https://artists.proofprofile.net/proofs/artist/bcdfcee0-9be3-481d-9a2f-2713f5f1bd73.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 0xf8396f61a7115f7c9736d53a673f568b5598865322a97960b049b8fffb5cdb35. 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/DESY21400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d712e1fbfaf1d9b6173d5e3babf9b13f088a1342f1c5964d8daf575b4950cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DESY21400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57184634499fc376468c4c6ee728ccd038dca551cf8a1711637ee955d61cd0ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DESY21400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692268894838a171bd5de7220ea8662157fd22292dc269af648f2790f665c945. 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/DESY21400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10fee416291e5232f9b7738da922e8e0a534ee48806075793c2ef0e04d802ef. 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/DESY21400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f27dafcf9094fe9bf377075f001ae311c4202f7240d581a6a67fe5e1f7999. 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/DESY21400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ea558b668a9de8021f722fc1744e1f5a662b71fa73294bfb19722e0e60d54. 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/DESY21400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000430cb4bb027f7c43dec48f75996c98ebff5e76d304e3be56b5ad7886c07f6. 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/DESY21400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73b74e549506e6b5d223d29edef7a1c6f2385b5770d784cd9575f3f84962e9e. 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/DESY21400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd79af73304387d23cd7ff7ac2ed71288de1251942bdd464a3728b478516c1e7. 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/DESY21400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc247466c69ac7885d9b8de1636f89c39e494e305db98d7b1dc2bfa9bb9ec6bf8. 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/DESY21400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487bb09305c2a31cf073f8005347f967ad79519888bbf72c09a08feb34821347. 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/DESY21400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976637b4c07ca880032044dec437cce769e838dbf8963740ac44a0fb418f323b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEXC81900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736dc08c55acb0bb6adecbd62f12598a14432bea4df8e551811f811d4a35ff18. 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/QMDA72136298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2639278ca938dd869f6fc99d609499b2aa24c6b8657aa91dae5aa068c414e8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QMDA72136312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3f27deda8d33ab754053633e0b79b91f4c9c6baa33282ebc9c4ec82a790f6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEG932204034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1513c4b6b1f6d0e1b7bd706302b73bc4ab4b71f5b29c957f35d03ea32988b. 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/DESY21401282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2142658d8afbc7a0081185465f7107f85155fec3bb0b1f90effb2ca91d630. 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/DEUM72307185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f6ca911141fb0c8c2d79008f67310f02bed29504626c6fc46ee86eb48220a. 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/DESY21400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c117b5654987f02555de95962eec1fdb25f0e249f0c2f840a273ce09047d4dc. 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/FR96X1937962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d9c760d87dac0302fc5751f72b0371effd3e9ef7b4e756811fd98ae4673bad. 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/GBLFP1660179.