May is the fifth month of the year in the Julian and Gregorian calendars. Its length is 31 days. May is a month of spring in the Northern Hemisphere, and autumn in the Southern Hemisphere. Therefore
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 0xd070ddff13db4878363d96040dc3048762781aeaab4e2a879c1859c608f52cb7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ddfa82a-88ad-497a-8321-a8aa9be3a689.json and https://artists.proofprofile.net/proofs/artist/1ddfa82a-88ad-497a-8321-a8aa9be3a689.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 0x87b72a2ad5e92f845e5be1256ebe3fc66c2526d63a98d983483969557ac09e2d. 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/QZHN32424066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c25af49e62125dd28d522640d1fb60e4c9632d803100f98cf686d3e8fd37c5. 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/QZHNA2570914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb069ac39e2f58b111e9b2034ff9d866adb86080b6e52c9276df72f18e163be4a. 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/QZHN32541148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65474a00f9518b406ebb1702b24a820573c30e95e88c64538459cf900ac927a. 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/QZDA62555042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76568cbd3bff533be7f3960c744857b9cf3045fd5101ba4255ee3c37a17f589c. 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/QZFZ62526662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82230a8e4652ec8d9e62d595d78757051ced3e1ef82a1c69eb01fc4f5d3008d5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZFZ32545293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cde2fafda35b1a5ef8b37d42c042d6b703f9a63f1070e4bf3fc1a7b678beda. 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/QZZ7V2434394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ceab3794cb521eff90b27a276fbaf32789c8296187a71cfbc8e828a99451c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFS2447654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543f4a5ae1448b988b2d200ddf5445ed7f1408802cbab686009fb465a6cbbea5. 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/QZWFR2499590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630faa09a20e73ae90db68e56bf54d9ae36c9b922cf0b4d5c9c89881db26640. 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/QZWFJ2403931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e501c68610eba84aaea2b2e5aee7edf52bfe7d02d341b13a63b4765edac087. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA0H2458584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5c497c8bca901dd928076686a38ec79a3faa9c595d4747480f94630d5a6267. 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/QZTBF2498315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f281bcf68f9573666fafd1d2c73a2f4e77868ad5a3329c4976c4a16fa825b4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB82476838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3b6699e65dbce1882e47601afe08e994808d2f0c2109a4630cb971e7afe10a. 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/QZTAX2476617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77aa9b4b1f2863134f66941acc3d97411aa9fd4298a3af7e3f6b5ecd1dc71de. 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/QZTAS2430962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f33e8fb3229190b5d2919ba2d5de0f97604c8239027acbe494e79e5263d593. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2410705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e387e22815812e9d6cc66ab972a1c1cd7411cd3d3dfbc56c01a4357338c97d. 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/QZMEQ2442979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a5d800d2930cdf491cc61b43e9783647dd8cda61cc13f964cd34f404be0f2. 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/QZK6F2466420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed892bcc70912dbbc3ba55f60d262c1be7bc104600f4fd3a29ed70009bf128c0. 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/QZHN82417658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd3ef7ae106be4483074ef10bf3930d72c987db9ad8bd84734c4f76aa9b5cb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES72402570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fcb38ac2553479bdb8e476b823fc045a99dc5aeae473605f28e56907bca2d. 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/QZFZ22486282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2728fd1fbfd5fe89e39788c564887e2805a7087ed6d2eb46926c75628c456ed9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYX2497310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba795136a54bdde0242206ebf7c215620e74de038ee4a03890156a89ec488e2f. 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/QZWFN2392977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1406c72df326d10424b3ae8fdbdae1b6ee09effa71124d1a8518e86ed901a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFH2342157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c27164c8e1a0628991e161a1d0211ce214d097028b2dddffa3269fbac3c118. 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/QZTBE2368158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2451393c7a7cec31a3bf8952c7aa011f78cb4f73bf7e5db47744c1cdbe470146. 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/QZTBB2322607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76315b0188a7169f3248117b830f4432f4c04c2973b93e323f44ca65b6d67e28. 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/QZTB72381348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb98e26cd5086667e143d8971d71641dff217347082e83f3b8a8560042b22d6b. 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/QZTB52343981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4690b141964863789a0cca80b1e567b63c96aa33437d25f85153891e3a834471. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZTAS2305106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed7038cf73a7fdf15df0930bbd34a3d096d75dd9b3c592603cb36e9b811665. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42389487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009095ad178029151669c6190c1174ebc03fc2241809dfbd9b743a2570fc9cde. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2294064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ade6e99c5ed58c054b9b270e76f7c9ef45ee10a79160724c5d3be8f26d5d748. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM42K2375221.
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 0x26c73258a911d733157d463151042e3c51efb1bdb4dc858c3437420bbc2c6b7f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTBC2326960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0238fc29f0696e274007f2816867f3a6c5681e1728536100fda290a33ced47d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZMER2239265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b99c619305fdc0594f125fa60744425e24a42b128adf24344c948bf4525ce. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZK6P2380432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b0dbcebda3caf33e071edf464f158c2415d258b4712a6ff8aac7f87d9fe9f1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZFYZ2329513.