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 0x952fdd6a4839e27a1d751d4fb09ab41e5fcb81945b2e5caeb6659e63fb6da09b. 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/842228b0-4a23-44bb-83fe-d4fff5cc9f12.json and https://artists.proofprofile.net/proofs/artist/842228b0-4a23-44bb-83fe-d4fff5cc9f12.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 0x932e24e07362ae18f1377d81e8bf8c3b2e6ed6d03cc740d0a2b4896390075a14. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/TR0331610558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94d7afbcfbd8c92961a99ca0a66be569000b96137bbe2e7b1b2700bba7f4c68. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TR0331610560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05f2d46aaf4a124db84a2498524fe6e1bc8ae88db5af2c5ce9d8ac000fbdd9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TR0331610567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7227998bee0ecb78cac3339b7035f9728db4d3e56354ca67724a8cfc855e28a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TR0331610556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f15eee819c6b69f6544796b79738232905af7041b5b015a6df15ad44cf300. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/TR0331610566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b7e6a24ae3ed8b1b460fa482f51cfe15a5aac1853e7938f52fa6baa83384b5. 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/TR0331610563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0e1c82b3b6e77f65952757ea1bbd6b30c8e623d52e8e0ec3e62205042d668f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/TR0331610565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc441637a58628a07e62989653d4e43bf842b611d88a5b8844758f2e93d57c69f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TR0331811266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71215aaaba4124feaa8cc126250568fdfbeb794dc2988912ef8bd979b638bc98. 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/TR0331811263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedee9c4732552c6db691662281382f422cb0536ba43628cec45bfc6d5b959798. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0331811264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc771a3082d40c702eca44c7c99a51a2878ba3f1c2d9cf7bcc8a45ec5fc5967. 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/TR0331811267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d87a01d873667dee1672238588e4df15fbe4d42e7f9229c548eda007ed16a6e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TR0331811256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698a8f09b13df3b48b06aeb68f92c9aaec56b009a48be858cd9bfd992a4c00a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR3431901530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53f7251d9160fb03133045b2176321ef162599f3760326f852f4b977142acd. 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/TR0331911921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e764dee24793a37670122c2d3eb548779a3a4c1a7fb1be5a37b4400c1a0a469. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TR0332212765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4e1ef9e30daf89c2cde68452a38320e8b3d77c8bdef40a1221494621994ec7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TR0332212850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8e1dbfbe77d879e02d0b82682d61531457a7d955119d23d7efadd6c4fbb313. 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/TR0332212887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b35b422874d778c93a5976af90fb11e2d0b94ba84230316a349bec88246790. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0332313220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b81b9b953a8d2ad473fcd28cef9f6ab3e4f84f7fab354a497507332ba31b5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TR0332313319.
Siyah Saçlarında Hatem Yüzlerin (Feyzullah Çınar Eserleri 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d2d5abd7bcbf49721540f71f11c5919d2fec554fef4fe7cd916a24ced7a16. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TR0332400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd18b3fd909d5c1300b67920ae5c223e53a1146dfa6ed2c5aa42dd73dd5994. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0332400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d45a9edc097679b268d07afa471b05e8eb079be3a4563fa713582afde7d87. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TR0332400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e765273d87415391a696c147b340071142b1a9ecf013cb37be67787d6ed284. 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/TR0332400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5700b2197fb9a2fb6c6cb6d89d422f15c9367acea901ff07afde9f214469598f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TR0332400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02faa700e1f4ea4250efd515bb554304ec31f728439efc5957b2ddb6d81f0d4c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TR0332400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85704e2fd8ec30e4a8d2f20987a1164d51caffa76149b8a113689aeef7a63acb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TR0332400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e1ea4f564e619a1f99b8dc0ea760090db3eca0593c1204c246ae512850b18. 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/TR0332400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8960102909eeb87e8f8803d15fadcd71b5db62c5c5222e68b7c53bf2d99d9. 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/TR0332500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18bff27ab8b75a62a3687600fb00ce108604d41d3dd2462aee473d228ffaf2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TR0332500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d2d5abd7bcbf49721540f71f11c5919d2fec554fef4fe7cd916a24ced7a16. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TR0332400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a62fbeb320f1436d06362ee6c953f4743cf82b729cb7ef5e550b72ffa8fde09. 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/TR0331510015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d79ccbd738e71351b65dbcfa1a4479407e6cd28b093e4af787d4da9f597632. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TR0331610568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba2706d8fd866c49c2eb0210e89bcf9f71f4737313c88c76af62204f80a58c. 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/TR0331911992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cd1fe3a0035c45c13370daa8d46716399c2616c6756a95b25b47cf28fd1560. 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/TR0331610740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d648b6cdd3dc659c240fb5871ccd84bba5ec9bad85329f8f21560261b45d19. 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/TR0332112686.