Massa may refer to: Places Italy Province of Massa and Carrara, province in the Tuscany region of Italy Duchy of Massa and Carrara, controlled the towns of Massa di Carrara and Carrara Roman Ca
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 0x610eac80605c72adde3d180521629bd9ae61fc782cfdcd53c9ca2a0096ca84e6. 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/b444bf0f-ac24-4aea-9dcd-eaa75fad6e06.json and https://artists.proofprofile.net/proofs/artist/b444bf0f-ac24-4aea-9dcd-eaa75fad6e06.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 0xdd53bee95f78d618d33919053035ee806551067ceea811d6c32eceef6c307ecd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21824194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a248634aceecf845c8277f098778bdcf5ea0779583b4cd55d7852a0d10bd6d3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USL4Q1908026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3cee1b690b7cb68d97cb096a5b482071e71b43bd2a0887ca45f83025169348. 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/USL4Q1974440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8e8a204a5f86f2d9abf08fa2b40d59cd5e8e88d20998925b07b2d32adbdd94. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4R2004399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a9d5e5d5ab4f6d70da3813d1f2a528e0a99cad0602716ccd386b416bae7bc6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USY282002463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d80f6c51ef583a9568dcb1105c1b65b0c6ddbbb125cddc8a91ea69280ead331. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/USHM22123307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8f005d8c8fa12cf3dd44f3e45ee034b1c21dca213651ed19be9823893c6354. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ2206165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a749cee8b4648ab1c115250b5acf1fc815ec1e9ac2ec729aebed00d8f5762. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ2206168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc3ab9db8cfcd68d6975132b293ec0471a85bd194876e7b2b95be32a2272f36. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ2206169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4083345fdd1dd589bcc9d002357acceb439019416d0aebf40030bc035c0a73. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGJ2206173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa434b0acced1e1bbc5f8230ae092d106b1b9e4510bf3db42e48cca03f93481e. 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/USHM22294589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9e8a6aa662cf52b35c817a77b76d27a3680017379aea05122c1db96a6e23c. 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/USHM92290228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8262a81bbdd645cf64ca7d86081279684ce52681d1730e05f066f3f304b6a0. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USL4Q2231212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502bebada044898d7eb2454bb3214fe662990f312b1caf7a9bbb2bbb19be6d26. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM82360100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023136c2dec2c5243b179c90cfac688898ece9d646d35afd5fdb4c563f7875a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGV2303528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab28a797884e208471d36512762429e58c531bb4625c5f3ac2de17a0d9c3f98. 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/USMH92372347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50dc370e37900af5ab4c40ce6350f45cc0695c1146803a71825c7ea69ac2a5c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USX9P2398631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225882da17688e35cc68c302311e829776906d25a0f99a3baa04e0e72106be5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92480696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180f5e1df33ce671bcd3c6fd7f23b6b42db9e2338254e924f984e61fcde0533. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USL4R2405197.
Hamma Ko'zla Manda (Dj Tab X Dj Zuxa Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8365d70bada8cb7c8aa0978c5ed9efbda300012eaa1e0ffdfa43d173f6ed2592. 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/USX9P2421983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af1466502144c936d5b7bf609d114d12469910a1aa76fdd98e43521320c265. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AMA0H2500629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab85ed7df291075cf1d3cc0ac5d55d02fe8e44b892684f6d0ed6a8ed1150093. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM92553053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125f10540f1c73948a41cc45880282e96cd8b52f55160342652822d7eaf38615. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USL4Q2567291.