Acronyms SAMI, Synchronized Accessible Media Interchange, a closed-captioning format developed by Microsoft Saudi Arabian Military Industries, a government-owned defence company South African Mal
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 0xdfe50a6cad07e0e76c94f975222a6c5a842370d4b165cecc97007d58ad73f9db. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e458ce8-7831-4116-be01-12512ad3d9aa.json and https://artists.proofprofile.net/proofs/artist/4e458ce8-7831-4116-be01-12512ad3d9aa.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 0x53f9e7856e6c561787ab67895480ffc757099bcd81daf735e4b8e1cf7930ddc5. 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/PLC271000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad2c1a6867720cd79f9dadc2c6d15ec79cda2cf87cba86f0b725636f4ee54fc. 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/PLC271000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2588a8ed6cc97a5ec41495ff953069032383998fb023da79384f83093263e455. 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/PLC271000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280bcb8186c09f83b75fed8ef375a67d3a48fc60a9c558b545d52a808755247. 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/PLC271000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1131fe7237b63488c57258732eebfb0ababa1b87bbbe727bfdd4c300533df34. 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/PLC271000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74afad8d5e850d5b83a8eff350f951dfe1f83fe177e031babbc387e05c8b6781. 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/PLA880200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786a21e19954c8e2dc0945f5480b82f1c84d858015725ab4421c22f1e4b44d52. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/PLA880200002.
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 0xed11c3a4a1f4b3fdcccb4d9200ec9031081da6c6dc56182fa7fbf15be297a474. 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/PLA880000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2807b7b8eaa0bf5428bcc83e4822d63efbc813fab20936983b3c7574f7ff02c. 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/PLA880000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279be3c5dc45d76231a10f2017ebbff11071a432dc6f581d821ba6a246bfd96. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLA880000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde767af03a8c37c4dfff1822ddd805a713a8949c68b723ce667cb557d01a7fd7. 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/PLA880000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6a6eb64409206728536044649af4f037d8459c79c4bfcedb19e431afb43f82. 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/PLA880000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e141b8f65a834910ed70dae4d07cfb9c180e4e5ab7306ec71a5800657c352. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/PLA880100991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201552d9f87f0e642c3dfe30840815c7c9bed8fb87fc064ce3ebdb41618c1a7e. 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/PLA880100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbc296b0b8251c1daad05a49740d505e9c9d4d2e3412b397ad18a1bebd1e945. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLA880000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02199ef615a1f4aef47415a50164dd7fe4559066fe3d896eed2c962ccf335a7d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PLA880000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0ffc0e2c7e56bf062e671adc9a28ee04b3e30322a0decfaf8e9fcd9bb1ce2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/PLA880000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49add818a6a0bc80313a936ec7a93fc5bc4284fbc666f1c1c4aa245492628e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC271000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0754b1c74b8bb3486bebd553f530edd43d793c3c471c352db4e6a7c973889. 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/QZZ972446937.