Marvin may refer to: __NOTOC__ Geography In the United States Marvyn, Alabama, also spelled Marvin, an unincorporated community Marvin, Missouri, an unincorporated community Marvin, North Carolina,
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 0xeeca439949ea060d59c59bbc55ffc8f714a9f4e64dc2b4585d1a851d949eb2bd. 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/9f917c64-6eb9-47be-ad16-e6a1f30bc66c.json and https://artists.proofprofile.net/proofs/artist/9f917c64-6eb9-47be-ad16-e6a1f30bc66c.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 0xb9a7bf096e85ce1a818076ce2baa3ba48d7bd93d9bcadbadb41524a025d1efc7. 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/ARF412500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa8b0f824c52ea705a6e0053236d8830efcd7f7e7959577418a8262ed2b33de. 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/ARF411900143.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2d0dbe239c1f4e33325540b2509195fd95ab065db763c69672fbd1ddc61ed. 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/ARF412000160.
Vintage Café - Lounge & Jazz Blends (Special Selection), Pt. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b2ae0e8cc98b9b5997a15f00142d99c163679ee0b1d7a9f98f43859f2d3ba. 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/ARF411601100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006296eba12f98b1867cd479ff4e6ef9329724c12b1032499a48395f2994dca. 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/ARF410500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e93cc05b09981bee6be75d98a41d2342d3645ebcf7f13151143f4e486d2d396. 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/ARF411900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006296eba12f98b1867cd479ff4e6ef9329724c12b1032499a48395f2994dca. 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/ARF410500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcb31d4642b3e10d69ebb0698745ae8bbafd510233d0c06969cfc927a4ce61d. 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/ARF412000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542edd63a51a472fb90ff43f9252e563449e3805960007b125241398347f782. 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/ARF411900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47394d346a3b85515bc2b51523ebcc8beb3639d1fc544db52c92b2a2adabe24e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARF412300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287f9680347327eecec2a3f22f55a56d9045295bfeb65d1c6f5522893d2954a. 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/ARF412100198.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a701dacbe8479f2040aa7a8dc24aa938abbf8c6fd8d5b3479b274f0bf484e21. 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/ARF412400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c378637045c22d3698de5b7db7e13a9b2f7fc74e0445bc8f7660a90ecae0b59. 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/ARF412000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa8b0f824c52ea705a6e0053236d8830efcd7f7e7959577418a8262ed2b33de. 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/ARF411900143.
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