Sa, SA, S.A. or s.a. may refer to: Arts, media and entertainment Music Initialism for "soprano and alto", voice types for which a piece of music is written SA (Samurai Attack), a Japanese punk rock
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 0xb594b9289e1f0c8821d4c7bc7c4bbad24f8c7639d7ff2b5356cea357330853fc. 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/816ad1ae-1e26-4593-8020-ad68b7727d6d.json and https://artists.proofprofile.net/proofs/artist/816ad1ae-1e26-4593-8020-ad68b7727d6d.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 0x0338889e98e12a6e891aeac0f6e03c10d70dea4a17aa8c04cf340ebe3fc02efa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPJ900603710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf4e93d799717e68253e42e9b1e7e72ccb4a0943a3bb246fd01d0d9f6bf2ef2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPJ900703770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fac6402d5efae81aaf6c6e3acf46e33cf44624da75b4065358ec106199a4a3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPJ901113360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c61445565b717726df45b5f6f22bb578617b4ec5df57275eb5031ea4003fcf. 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/JPJ901113370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4ed9086a9f14892631e02b7866adec0096cd5b9a5c093dc9e630ab22f5e102. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:54Z), 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/JPJ901113390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8744989dd1ca6cd97398dd7500fc34288877494df9f0926cd6ece6154daca1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPJ901113400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3d91b29de07f0c66c1a5bfbb7eac588718a33449b5564f32870b1c18a7c4b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPJ901405330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c0069461d276b314e3d802d73b57310052fbf3fe10466dc64b94540b14a68. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPTE01507700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9d9f0bf61fabe8ea8780e9c08dc36d6db1f61c2c0b67815be481c19cfbc723. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPTE01507710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4531ea667b61d6b6d7ae7b3a6d0f2c754f7254ef3878367ed421c192f25da63d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPTE01507730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04283c664f45e107698e504edd027d564f6a3fac8e780331c1740b926f021455. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPTE01375360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fbdd1b990edc3c5090f48600f28aaf79bd07a722415cdb4ce01fcc0b0410f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPTE01800640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373bda13f3ea3dbcaf33fa4bf79719d8eff42aa7f833bfb6a3795db37c512a94. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:47Z), 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/JPTE02001830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ade6e05da9893e9cfe91cb807162491b9510752cb7af011349e04d109d9cb0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPTE02001530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3b2a255c9ecfef9ae70f42514282b23f5f38cb6890d6bf73f32692d1e5ab5c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPPO02302754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2413d6be5830b68e2053b1aa364574011d246e2dfc514378cf9197f817c13db. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:28Z), 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/JPPO02302756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2dd318eb03da4ab17e3ef19c15dcd71d71a129e7afbf04089af40695dae2af. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/JPPO02302760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034aeef4520d8f5fa5555cb9ae5e36c32f1bf2aeece6d7095de75cb1b26e0d19. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:11Z), 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/JPPO02404401.