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 0xd2aa207666829c3246217b55d68cac58d4f23ee306a75437759a88c9dd8e3144. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fedad31-502f-474b-9cae-e19f4892eb68.json and https://artists.proofprofile.net/proofs/artist/8fedad31-502f-474b-9cae-e19f4892eb68.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 0x28420646c24fe999976d1abf6e17ee35ae6d099aec1532464b306f4c1097ea0a. 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/USA2P2153149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e4c1ae3696f65e21e7d290ddc43741b73dcecd9d920f00b2090d8e95a4bb4. 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/USA2P2153148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b79d7db1202b272b46cea149830fee461fb46fcee15a311460146ca14cda395. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2153147.
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 0x62519418e5918f60b1420e01496a711cdacf1afa8d2f8edb123e9b02c3a6e768. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA2P2153146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb663bbfc56329ae954de598e63ce474bac3f6236590af77adb1482fe364a7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA2P2153144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d0d11a62691b4bfd415cb4ba82f5d8e9da63cb8ff4998489f1ad371cba3ec1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA2P2153145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb27ac809e3464e8179646e63e4a25370c920fcca4d36c51708bdd18cc1056. 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/USA2P2301505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47134dafe76bb6ba09d1981e67a9bc19e7da2acb4dcb1b605ecd06047fe9b660. 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/USA2P2301503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620a9d8c23d0333a2fe38d0cc853028a823d508be966ef8d76cbb82da349daf9. 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/USA2P2301506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63481eef4eea8382c81dc8e18edea0e2d55bcad2254f84a935c998dd71a1aef6. 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/USA2P2301502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce66d9be8888b8ab6067b21b6820327767ba47917bcc8e36cda2f1ec2e26203. 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/USA2P2301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6480f4c8dd4ed64b43d2f4741e93bb6e531ad969757de6d51a692b3aa9e1396. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:39Z), 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/USA2P2301504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd22734a5687ee99456e0e8a3e8c1b6775863e17c0ce6f15f3f761534de681d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:49Z), 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/USA2P2463563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c9303e3efb0691cbde011e0c3f563be3587905c4995cd3303fed4cf4ae628. 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/FR9W12201714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06077a2cb26b7e379e3221f859aaf3f097dab0c77783e7c2b6aa4ed80a93a436. 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/FR2X42254847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92b347c97c0a7959545eaf32a431029e47e15efb1783b53d5bb572222734af0. 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/FR9W12319252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c8fb9a83fcec7867129cfb3f8e0f959fa2278776ea9ea34eff1dca8538a1c. 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/FR9W12319253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c9303e3efb0691cbde011e0c3f563be3587905c4995cd3303fed4cf4ae628. 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/FR9W12201714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a28ef8c032a2f6fd36b410abe83ab8d33fedaa45f3a371cc36a5126ef593c. 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/FR9W12307555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3d6e6c7180edd0a6bcf74bbe2d71a09b789e63b4772cd8f7b600dd26a173c. 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/FR9W12246836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e47ce766b08322ccb73039d1be311d7bb60cac348a3e85faf6dfa65f5852b. 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/FR9W12236806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335faba8312c87b07800b14758b7359d59b02ba98dfd34668ffd456edc81dd3c. 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/FR9W12236807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe79e45c063959464dc6fdae7f1e56c0ceda239e538aec7431c138ef762f079. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W12221491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682f6516a183f1740c7b00bd55706e16514bbb5e44ccf61446695f884a4f5aef. 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/FR9W12221492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d347cf21ba3a0fa7815713dfc18abd4ccf22886573fc085c9bdfc1b8ea3ea9. 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/FR9W12218683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35c2a58b2347fb47ddbb522afd7f04cf1886f25e82804d11030ecac71fb3bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W12201724.