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 0xceaa82ffd745886bfde21e7251a51852e9b45805d1aa8ac34381fc26e1e2435f. 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/10c61a11-1bfd-4c42-a03e-5f74c4cf5ccc.json and https://artists.proofprofile.net/proofs/artist/10c61a11-1bfd-4c42-a03e-5f74c4cf5ccc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tuyển Tập Các Ca Khúc Song Ca Của Giáng Tiên
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 0xf83d00e585fe15fdebb6aa13247e17e69d84273ea96ef9873eaf165c17e91e63. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/VNA0F1703280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1631ab641ff36f6d8505e82e5296dde643ff4201ede35e05f04331822edc129. 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/VNA0F1704710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc1db1edf923f043fc76ef8a5bd0011719b1327c6076caa783d31c3487b52d. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/VNA0F1782547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f41a444e3b779f7850ced4579fd3f276ac05a7f699743cefd0c7f31196bd37. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2139601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5760bb369d95d01b8e159ecbf80283236b7b31f14ee1291d1afa2c3476e38822. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR10S2139591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a2f9d409de5e01247824063840f8dbe7dfeba4857696a3001031e0c492f5e. 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/FR10S2139594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3079a806f0dd872a82d7dc82357cf5bbb1cfbd099ea73d5cccdcf70e0d988. 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/DGA062009364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da05bae480a0405d7a14d990ad6a778f34041ab23514e86465bff2973af0c2b. 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/DGA062009369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfcf7aac26d4ef5ef274ff9a3e5329576be57ed5a572acd934be89e469e5597. 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/DGA062009375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ea8bba27f87231f0e665c7a1e3d1ed37e14cb54818050bccba6eb1b62ff2b8. 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/DGA062009374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b70bbae7d16f5700b82bbeaae8b05a5d9d64b8098ee81fe0642aa129abe9a4. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DGA062009373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338e3e18ce4c78eadfca805f27e9e1a50cd44cf0735de568541691875799f7e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DGA062009363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f1501d38ec9445260bccf6efb1ffced5979e946b3075677f54e4868d23bc69. 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/DGA062009366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfe1789c41bdb6bb3f0bc511166715d2f71e1d112fb233d863c24c04cc01359. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DGA062009404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaaf76d9618f3a6505d8f58532e3230f05043b1b251d6bf1266129d8ad2c87e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA062009397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ebbae7b2802684a09522248671821c99568f49c5bf9ce4b51cd00f61a44d6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DGA062009389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06889fee3c05abfe8461bad2092a479da4aea1f1eed228f91656c4924855b8af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/VNA0M1842251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b4a9323c3baddb341e4f11efeff23ed7a5e3c611b239ad4b88bbd15a137fa. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/VNA0M1842280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf433ffde9091d18dd89d846ab08971cc29ae1bc3983e52e942c6fce27e84082. 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/VNA0F1781469.