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 0x7c8e7ad751ffdccef0fec2dbdbc88691b7317b759c42bf769c5b23a2feb9be8d. 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/f0efbfd1-49eb-4e9f-b89e-f12660999390.json and https://artists.proofprofile.net/proofs/artist/f0efbfd1-49eb-4e9f-b89e-f12660999390.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 0xa16de523962019b9d15e6ceac52cb2ed45ba29af58a3956537936624a2b3cfac. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCJPP2122667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143aee024aa211e51365bec3c5021ce6c34189d9e0350f9009c9a5ab77714595. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCJPP2122677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead64dfd449865054bdaaabd8a494eb39eb0f91d19f9339c7b687e0a090f90d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPP2122683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25b6c56cf4bd1713dd74f581e7286ee996830c7a280a7bb928bccec0b1ea715. 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/TCJPS2266031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc4733e50b777b8a93b7c1930912c72431cd1c0ffa6f096074c67e4de43dc4e. 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/TCJPS2266034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efad81ce108053b020e459e2dfffe6a94aad2e217669883aaabf8a7e914aa1b. 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/TCJPS2266035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feb0a1db127415b3e9b4b75ebbcd61f05abe3453390ca018148032e266e5b73. 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/TCJPS2266036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2d7e61fcefc083f1e9d4aaf1d9108438e9c7ea8c24c5a7fa01e1d4d9db76e. 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/TCJPS2266037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df3b63fe7bde0575e602d412a6f1d8342925b5d2a77d4dcce07ec0d193c398. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPY2327983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aba839b101e85834e08ee9206efb6465d4d6d53d549be3fcaf7806dee9d19d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCJPY2486482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aa60f342626f28fa2708dfeefc9c1a656deaf967e2bc6bb4afce6a5283ed2d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCJPY2486492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcfeb47cc72f06073db335a70a990990018085ac72596244b33caf164465e11. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCJPY2486493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32314c5daf19fb06ea15608539ba3e98147a6135deabe7a8d50e121e99f918d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCJPY2486494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf259e3934c98c967ffe5de0a4aebe93a2dfe840990e8b0c4346daeff39643a69. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCJPL2558873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea3cd5df057595fea86a65051569f84e703511aae80ba89997d94ab116958bf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCJPL2558887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeea2d216d97705e95d56f6c8a66b33515f73a1871375899e536c060524c1de. 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/JPP302300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059a4447732ff7fb086ec5da229276ccda729713875e9853e860901a5f060b5. 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/JPP302300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84875ac6fe74c10e73f64614df6ce9f5954f491b853013f90f7fd5db5446b9e4. 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/JPTF02229501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059a4447732ff7fb086ec5da229276ccda729713875e9853e860901a5f060b5. 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/JPP302300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29581f425d4a3b8f83773f8ad1ba18775d23b4346775390b8f598b8d9cc77e. 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/TCJPZ2413707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecf1d3418b4704db4c1575df3293a6b63a9188b0d82f6372bad79b4688c28d. 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/JPS802356535.