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 0x1c1d5331ec0b031a9fb82024a3cd3c433eaa7ab85866a67061919a53bcc56ff6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af3f3352-ce8e-43d0-93ea-7ecdfa0e1d86.json and https://artists.proofprofile.net/proofs/artist/af3f3352-ce8e-43d0-93ea-7ecdfa0e1d86.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 0xcfbddecccc391169b1a18db132ad46975b065d205074cc46a8dd958bd3e9a8b5. 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/BCVMA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5138810d7d461afe8d6bddf77aa15aa012fe8e15491a752d3bde6b6fede806. 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/BCVMA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7252d5561cce2081cc9bc6766df34fed4ca0730505b3a9a8087d1c3b2f599b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCVMA2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa514759c75c718e64c397f2e08bc87bd88000883d5052df0b1f526e5d9f336d2. 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/BCVMA2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee35272af159e8f1b50e9cb89ec2bb7d28f40d7fc56fc68e772d893616dc783. 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/BCVMA2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71acdacdb377be5561267bf5824c59b4bf49c3f94bbcc8d65b9eea7cfbb3a7. 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/BCVMA2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d300c1aae79a4c37f1fa5b8823185068a0195a75a48932e4a439436e01c0c1. 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/QZW9L2371747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8cade59c9bf517e07dfe047e63a3f7624cf5ac9e6e32c4f3069c2fd6cc2797. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJW2499510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3d502a35a30d7fdbc5c252dc4bf5ac00cbd7064edfe2d8bdf0394401b5f1d. 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/US7VG2469739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1ccbea108022759334d5b10c4c92324bfce8bf807d4e7995a5a76070b0c5f. 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/BXZYA2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1ccbea108022759334d5b10c4c92324bfce8bf807d4e7995a5a76070b0c5f. 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/BXZYA2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c919fd692bd06392a4d1b3c25e3fabf2b896ad9a19ed3f8f31e56a961efb04b. 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/BXIV82440310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1c0c57109f582abebeea1047bdac86448c46d4a2a00dc6030dda6c95f617e3. 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/BC6M22425906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df7d18b7dcb09412764aaa61423caf2a025f1480cd1cd78c320c578948b614. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZW9M2319429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a103ca624a6c57da9f3a8e60866ec1d217d5b3a58a4b4bba32da3378cda4d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJY2484291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f691b42adf8f06220b104b45a8dbe461c9c94faaefa5b701739c948361637. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CBF8B2476919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59eeb1d853ef99713fce1e418c2c9f46611a00e8de840d6c1f32bd143a498cd. 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/QZWV32476180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97ccfad2640a618a287372ffddad223af64a6680763834badcd5bf717631c1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBLFP2491686.
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