Marcel may refer to: People Marcel (given name), people with the given name Marcel Marcel (footballer, born August 1981), Marcel Silva Andrade, Brazilian midfielder Marcel (footballer, born Novemb
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 0x3f1ddbef34a9264f35ee4fd8baa8c6a00320fe499baeeb83d145ef26536dcca7. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85a4a2f0-e681-49ab-a2c9-a102bbc8aa9b.json and https://artists.proofprofile.net/proofs/artist/85a4a2f0-e681-49ab-a2c9-a102bbc8aa9b.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 0xe0a0559f6d0da2b7b45899f1b8d772dde536507dc31e2ae9116c1b2ce2798b95. 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/BEDS72209001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5808ecf76da804d95701d9b75c31e9390ad34cd0c17542bcd1264ec03805c1b. 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/BEDS72209002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913cd36599ec818493fd70482b93ef9f153a3766a278e35e95974204a1e8e8b2. 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/BEDS72209003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab842b6fa62f49e9b02f41ce60027b445de8f96f01987082a6c459c7dac55c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BEDS72209004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7496c184eef469de5b3c34b0165670cb6d8b98477ba4d12804bd044a8e9d808. 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/BEDS72209005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11240cd0df18fb8f10eed3484b6e6a93a7f5459ad62b3af7a2f0a8bbba1e0317. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEDS72209006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47a623e4785851516940d4f01c08d94b89ab6eb4778f91f71519713258f816. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEDS72209007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe7eca1572488904a172f73364a24967401834c7a2d77c8393abbd7b871b28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEDS72209008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7641de0467fa8c7d96a886ada2f7cf9370196f8bd7d183a8545227f6db0a4d0. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BEDS72209009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901207cf6932852a477271285074a79b542957e00802c46646e3ba2e40dd2cc5. 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/BEDS72209010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f545876ebc8052692d310e7adf80f4a3cd1002d1401d44a1081011ce3b9ac0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BEHW72100004.