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 0x2ad132757380a5d4590550c88b3dd7263579c559b1983c9445009a886a01ec83. 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/504ea6b7-efc0-4d20-a19a-a2aeb740064e.json and https://artists.proofprofile.net/proofs/artist/504ea6b7-efc0-4d20-a19a-a2aeb740064e.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 0xff20be6a945c03645ac5f929711002387d2dfe34d0677bb7ab20689623504464. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ62379507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa708a7ae5fb3a2069f9b2ffe1a45717cda23b653dc3d1dac83306c38c7ee1fba. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:22Z), 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/QZDA62357588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282225c39aeeb8509a7de746cecdc37716b8f2dca9f3af0fb53c8420bc74c3b4. 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/QZHN32364841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278db47bd82932782e6c529f48634405afbb1322d601053b48f83ef6173f72c4. 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/QZHN72348081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e89a82eb1b6b58baa33226d02c1ab6451bcd1a6534aa17ffae1ac6cba0e816. 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/QZHNA2305559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd756621c0a6865fe4343fa66341cf622d021ec5d8e210f748e3761965dc94. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2397194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42c8aedff0ac2109b49c5556f57468f4f923be92785a63888671dc52da7d33. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWQ2321914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49130e9ba238a2bda4d1f0d2ea85545cc8cf83de44d474d882b2d4314ef2217f. 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/QZTAW2360923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e3309113f7eeb624d6025ad95d912023abf12a6cf9593b7ed977a7d2b77e8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTBB2383003.
Du gamla, du fria (Old Norse/Fornnordiska)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddde1921301ccf88c240244b2a509c4459a8f38c5daac806035458540965bd07. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:04Z), 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/QZWFK2340303.
God Rest You Merry, Gentlemen (Old English)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf51825c18aab6c91d15c07678786a81617dc3e4dad2f04e5b35c746c7a6c64. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZFZ62474049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc947d9b0d894b1a53b3c6243dbf4f2df7fb5cbc1fc8cf71d03bd5b57d708f098. 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/QZDA82448942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f18e00b5aaeacc9693c7dd5321cc1cfa18c8fcd6c325e07ee6851a1e04c76e5. 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/QZHNB2449088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace9bdb0f9b2dbd88cca1e2ac8b6e99422b3853d3136442d21f85553d8666b63. 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/QZHNB2449604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99936820d8c4dc2fcc0ddcc1a1fce021b3f40d2af6576896ebdc48b42784b43d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZTAT2489767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a30888247da3caa0e9a51dc77ca5cabc3a936c8f2fe2aec6643b72263b963. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTAT2489776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae65f209a2081d3b94d40fa89a372085c1e87c6cc084be532057b194206c4812. 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/QZTAT2489751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca90dc714bce4a7ebd86deacc64840e93c4ea14f75069e1f86600097313579c. 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/QZTAT2487727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f29cb9bc508333db71d4d17551bbf37fa68b3f2e9a34edfd54ed9cdcd2cf7ff. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:30Z), 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/QZTAT2494120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eefb6f08b78a2b84cddf56176914668f0fe992ff655d9710d008fae8aefec1f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTB72413619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80258e78d056fe5ae45b38c42c0421a1a0aafa249616be5ce2d5567f970a9826. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFP2447846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf310ac0fc663fc0d6465c57e19c73db5fc798da55ab8f518e02ae4698052f06e. 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/QZWFP2445701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed182324b49e516233ff2c9dea58e1c9e41d61c9d933cfe33fa7b95879f33353. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7N2488532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9990e2f6e323810ffaa2287b25aef08c0631dc188e419e5d21230265b82a5f7. 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/QZZ7N2490523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6773a7ff8bbeb05e97982d60ef270566df125f4a34824f9420e4926512979e7. 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/QZZ7N2490497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85f54b95c16226d03628f83c0a34011189f2c0c2eac6880b9e3dc32533af32a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6G2576374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973cb6a1fffbfaf4eaa4ee148f130f05c7cab209ba4ecc8776ec3588c5122a5c. 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/QZTBF2586872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4facac558dd69009ccee40e78f68048d87bd674c618baff2c43718e8dd8b1424. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:49Z), 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/QT3FA2572735.