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 0x14c5e30090a8770ef28d93d7f1d4137fb3fe5b86cbec9b9f640c82c9238a66fc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eda45c03-3a86-41f1-b5a6-920e45bdb3ad.json and https://artists.proofprofile.net/proofs/artist/eda45c03-3a86-41f1-b5a6-920e45bdb3ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Last Songs I Made If the World Ended Tomorrow
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 0x70cc9ab8b135849c30f3a3055c78051fc4f4efae6ddf16a11616b6fc2a3a0ad1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2161021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871accdec37a518f9a915691a482ac8ac4be334e3a654e313b7d461aa5b15699. 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/QZNWU2161465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb21ba86657865ec1f91c0d55d369d337d9319fc232e5d4a25d0aa5cb39aed6c. 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/QZHN32241364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc30a86e4d5fa5550743e12f1e5f5b1ca1ff323b68171cd57c3b97bd2f9b552. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:44Z), 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/QZHN32289346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b337f9212b3728634b98d424f59fbcb4d514d0b25374cdb7613de62fb21b16. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWU2201177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185783bb6c181a55af8bbc8baea130470e72ea63531377b95fe87fc33964aac. 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/QZTAX2274157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b89f49bab867819569a6a48820fe4b5c248eb787b527ea0d639ff3e18fa69d. 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/QZFYZ2304557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52eeceadae44dc80525fdc7278bf38457740070d4b80b87d266cba0a46bb64a. 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/QM24S2302182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5f5e77073f67745c1b0ebc23a41697f010acae80308dd05d3a7aeee9d40a72. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM24S2304153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77033cb93803b5997f50d2f081f3e1c0f6e0f3b14e8fe1b760d0f3b590a6e39. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:59Z), 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/QM24S2304829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e54fce50c1fa87e7e981b9d47a7c7e7d112289b63b5f5f4c0948f922e774e3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:57Z), 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/QM24S2305904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28200e0ad89de0c2dee5ae92bb1f20c7058dbb21ebacd4c3be1a7b176ce8dc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:40Z), 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/QM24S2305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52eeceadae44dc80525fdc7278bf38457740070d4b80b87d266cba0a46bb64a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM24S2302182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77033cb93803b5997f50d2f081f3e1c0f6e0f3b14e8fe1b760d0f3b590a6e39. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:56:59Z), 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/QM24S2304829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a0808184b549bb9ade5202a6410299b057d80740be18db4a88781be952d8d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM24S2305902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab6b7e207b710c042dd8a884168f0fa2b6fccf482d6c552115662b446d55a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:09Z), 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/QM24S2305900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbf1e824a735c2aea42bedb54706dbeb1c595ca0eb5603bd502629fea9a586d. 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/QZTB82369268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bbd62df79d3f09d5d92b221ce877049de921b61978fb6654d5739024440e01. 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/QZFZ22412946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c4e5ef746108363a1c67899fb3cf7c2ccf2a27c09bfdf016cc709081258f1. 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/QZDA62419199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b391cc7be3a444cd2cd8a11f7bad66a150976295bd14af903d92cb02778fd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:32Z), 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/QZTB82479778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4455ca1ca65d0430731aed673397b1f69b9ebbdd5493d5baea24ec13daa2270f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFL2439568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a14f4060844951cffd2077db3de065710e63d1040a9cad9e59e14578105c17. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFL2439569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37a3e8ac44943f2042774e974c2b92748245e5e783922be73fd81e5d10488f4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:39:10Z), 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/QZWFL2439573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5105e426d8543b944eed65c9523557431fd03bc5f66543d166a3cc7d944b0896. 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/QZZ782477790.