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 0xf4e587e5eb14b36728a45c50632a62dab74cf6d31c2a99e01ccb36138dafe295. 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/9740c820-f8bd-4450-8449-986d74057984.json and https://artists.proofprofile.net/proofs/artist/9740c820-f8bd-4450-8449-986d74057984.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 0x259aef131d5087c61c591a533439ebfc3b58776d781ccf25fc43c70f4b49237e. 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/FRX282114873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b43c50eff25cb8f7d8165bd67157c6553c670d697dc340867f9ddb6b499895. 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/FR59R2257839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab328e25d110e95269f0bf76280e1097bd043bef88fce3b2163c4a310bb1041. 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/GX4LG2101072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c21f932cf1fc4c97f3d03846d23e204b89c310e87f318bdd1c2bbf85f92fb55. 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/FRX872150220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9c3b0f63522e84d710ead34d80c90e16f33f365dd01be2a5760301a79f7491. 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/GX4LG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c3ee32a7dab7a51800e6c4f62384c9e35630e988a5922c2d2eb419791ad88e. 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/GX4LG2101486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71494509eace06dc928817ef9be6ab99bc4b022679ca62a58e205574ac438546. 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/GX4LG2101484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495aa9689a0cd2f09f232e23089ffeaf03d5508738506c00939dd5bd70c7e95f. 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/GX4LG2101481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56db369c93f10e3e69f39a612a2142c46d443b60c504c802bcea60a3c90f9f4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX4LG2101480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64367017dc556ea03d14a1b81db95416b945bf7bd910bc964fe4e0608ec76f61. 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/GX4LG2100646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea71de8c88a76ccf6d72cc1e8522949bd112e6fd10c10384b6726c109d1db6. 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/GX4LG2100645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e8acb0c9d0aabaf61f178abb83c3d37d5522eb586ff08210654f9131f30361. 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/FRX202289024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f138dd8f4b10c434e9c581ada3ffb647f3d63b7deb2147ddc03b8d5cae2e323. 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/FRX202289194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea793644ef5e2d53d0afa10b74bce81b78fa440a1b561a46630fb542c740d44. 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/FRX202266806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae803ba3f8626b45ce22a85652fc1d97d13f0ab88f0c2a3c24b8452df3daa62d. 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/FR96X2298657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a98102055389f83c612c94085b71df4ba9365210f59787c4328f6a22d80b88. 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/FR96X2298655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010dcb72889f1281ee438a8650491f7127418d0b06c760f7c61b5c49c5e0300d. 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/FR96X2277397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c64b5aa5c2ef9a99ac50fc8262fdcb8b6fb2ed5af144c42eb9a5ffb5df2298b. 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/FR96X2230997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e1acddae1f1b3c27c30aa72447a9f00e45f813238cc545baad95bbe2e4742. 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/FRS182108300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1494d888d153a3792f1498845d8e65f16ff113ec07b6ec2e8c4c15d426cfa3. 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/FRX872193986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f20009bba3d22897084f5577b4f6e559b02cf59399a8bdbd773147020fabf61. 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/FRX872158949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85611c8d8815897e16613cd5eed709540b82ceadf5f9852cb55dc3beb4232346. 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/FRX872120343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872582dad5e02fea8cf6ea36000e2c3f868b8533b349120743675f8f6c0e326. 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/FRX762166644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbafa90a3f4573e54ffb33cdf4e836a26151d8829152dffea0f8708fbbb24b69. 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/FRX762160995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8a9c056c5c730ada693fde50e148e5a200b492eb49b103b97b94c7521e237. 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/FRX762135970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb779160b4c4873c77cd8745a2a03b0a26301b0e161b995324da7d4331510156. 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/QZMEN2190035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c43f7e0afdbaed2f15781c5bc5d81085ef3d52bc4d7c80aa0f232e60160c4f. 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/FRX452121799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8d0c81dc46ef6e8d1f47d682eb30550a4b009b7b02326e525b2ee32f261ba5. 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/FRX202143993.