The gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram. Originally defined in 1795 as "the absolute weight of
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 0x080ff266c23783d043ae629ade27f731e8d7470153ac243233d168895010e3fa. 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/8905ae3f-09c8-4608-8f0e-e64b2c14049b.json and https://artists.proofprofile.net/proofs/artist/8905ae3f-09c8-4608-8f0e-e64b2c14049b.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 0x861d95dac90831289052e9a5387c5b09920468b84d1b5e0c9b8139afbb7634ab. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/BRSGH0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc1b043a1a31b967d739028dc7ba52ea1644db865041e7273ac83aef86320e7. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/BRSGH0400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cde3c9c6d08fcb6dd625f4f7770694ea40f1bcee840035c83e230fe453586a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRSGH0400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b56b92a21d680369cf1d5e23298055ee2937065cae70e0dd7a600f5745800. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BRSGH0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72164feda19e44004c09ffd94c87379b7ada8f314dcb2d601a7be1d49239d15. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/BRSGH0400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ecfde505a73594f90f9ff86a7a8f9e54e09ed86fc959b68cb3fe452516b09. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRSGH0400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a7619d70c5c806127397b2b7301152fddc5a6a1f8eeb5ce250ffb743ea6fc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRDEP0600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6fd25aece84b8bdbeec5cf382195c1ab8a7fea1a67693af672fa84a9abc90. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRDEP0600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc791e2d6381c29a4a71a526973fd0981c8862eab1d22b62e999cdc005ddfefe1. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/BRDEP0600352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2551c968c2caae55dbd233eccbfc72e3e7ad186412c0ad65f0b42d0f8a663035. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BRDEP0600407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334f70e8e4d30919f7ce0bbd24c7b3f3ab53265b9a42535b3913914010275336. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRDEP0600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c664cc2c7e2bb1a9578328e1ec0975a5fd17ce17bcaa65246aede9c8f02425. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRDEP0600414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3ffbf65038dbb55ee0d9e578d4baf48a6e33b9f610e18000297bc1f3aaea04. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRDEP0600217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566bd6dec0930da73a6d7245d9c097bfe3c6cb1ef59a460a51f330a17037041. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BXMOV1400002.
Gramによる独奏する静謐な鎮魂歌"深淵"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5cc332067059d6cb97547218815eef73e9e6c851a13b206e6a007552956e12. 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/BRDEP0800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ed0ef32c07d3d83fa7b9863cd93f08162525ef5edca2ab90f6375de6dbd4f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRDEP0900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3b343cac0ecd47c6a8bd07a2cefcdedb19889898f443a00ab7e07f32be4f31. 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/BRSGH0400001.