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 0x0293e05ef0033ebc1d987e2e8195334360497838e9a191aefdfd74a3eba04e4f. 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/1efe39fd-b6cc-4e03-9b23-9124cc56a390.json and https://artists.proofprofile.net/proofs/artist/1efe39fd-b6cc-4e03-9b23-9124cc56a390.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 0x54c046f5c363e36fd612adbc29f5264169e687db75b3580934c13917fef8a0b5. 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/SEWKB1611001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a44990baa9a2cd22a4101b1c6ed230bf53ba06e284dccb4f1b3891aaffa05. 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/SEWKB1414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27179be30647089f739a6bbe60a81d8bb37c74ada5ae388301feaa95a3e37c87. 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/SEWKB1602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bc341f5ad36a15c9d2defa2883dc79b1c9a93208209906eb4007931f97b13f. 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/SEWKB1811001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5723bb9dce205b093c25a501f750a0174744b6d0dded7bc9e81966b6a45ae940. 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/QZK6L2328261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec1a3d06be607a78f94e547f217d836ea48bb790f8183c8a77ee1823693a09b. 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/GBLFP1814218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05061fa361ea9c40c81d2690db8a778657fc99cae800dca573f9186aab5656. 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/NO2QE1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ff3e134056bcef82e80f35988911ff37a7673d18161586792a39c3516163e. 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/SEWKB2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28865209833e84743c8a9882bf4d97465b83e79cc35183b9da923cfe654076b7. 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/GX3Q92170557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f3ffa4ae5b65d41a133a0a7501f19000fe882c90963b29fd69269bc87f9cda. 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/NL1AP1948727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ceb109240747951cf56fb24561887f2465994d8b267076c5286448edc378e5. 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/NL1AP1948728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99df756d31bfde6be635d16f18387157c6d67f2eb89686cf639300a0902b3f. 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/NL1AP1948729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266ed026ed9caf697e74bf7e67b4dfee7f5874b1d77bc80024f796afa7c92972. 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/NL1AP1948730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9604eb7ba07bf741b7c9c403b77457aa42ebc785d2da5eb458c66ecd43bcc0e2. 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/NL1AP1948731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd9a6fc4885aafe07d03b5b12dbef51257063c5649b368d2698cfcf2450701. 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/SE5BU1988578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9334d73fa0a74c26bfbfe2f719ff6596582526926c72d58d6aa3ec51c98282. 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/NLS6R1859538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206a2a59e4c9c60292a6e0656227c3e6c5b84df50eb7abff43e6698f35a942b. 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/SEWKB1813001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bad59a244ad4e69dbbdae9fe0a381cdc04595de6a4f440ab5892dcf0d6fc97. 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/SEWKB1802001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ab1b8d3c61eda8f7b544f262f36115fbfc42c1f765f9077b6b49db1705c152. 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/GBLFP1708088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf071e026c68ddcc7c15348d72cb61b149b63b0f868c25944b73808cd64c22ed9. 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/SEWKB1613001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4d7da8c9a18356596e79e570a9058339c87ec0291da10cf2a29e3a2812760. 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/SE3OH1512423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa893f47434497cffd8d5276602504f8dc62a260829145e879c53328e442c03e4. 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/SE4W41900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa9a916cb3f7edc0bfc8cdaf6b69e31dff09f7c9f43e90f6711012b7c9eeef6. 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/SE4W41900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c91988d497ea1ef3e0f79d3fdbfbd88bef9eb7a625902906201abc70a8d0888. 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/SE4W41900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596f081d9b1b7467e879fa05ac2c83de7a271776a5a28c069a191cacc71d571. 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/SE4W41900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444dc6d36f034325e5ef8480724509979fc635cf12660ec6458591630dadeba3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE4W41900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac8c5f8ae8b4b329be44cd150fd8eee1034914d66adbad3a4cb7f2892020ce. 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/SEWKB1832001.