João Batista Coelho (born 21 September 1992), mostly known by his stage name Slow J, is a Portuguese rapper, record producer and singer-songwriter. Discography Albums Title Details Peak chart p
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 0x608138c873c5d52abbf02ffed61bcc23f801b6c45223d8a98f25338605a61e59. 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/603162ab-10c2-4c6f-a204-6872e00ddbea.json and https://artists.proofprofile.net/proofs/artist/603162ab-10c2-4c6f-a204-6872e00ddbea.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 0x891f1ea11f975d784176c219510de4e9f901c66a742421d9f55546fecb3b4f00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDHM1629981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322b71ff1bce46c661fd72a4174823c34dec69de368a5b7debccb48c723dda2. 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/USDHM1705498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38218566a68a0bee924b16fe9a6e25f2d9196afc3697ff2c037b6770170780b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT2HA1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57edbdd9669967dac018f8cc7b09d93c97ab0c85aac4bbbf8a810f863a37e241. 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/PT9GN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ac30f9d44934104898be86ca05197468bca54ee0d53f530387c0463b7913ea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PTBM12100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6801078f1c5fc1c27a4774ffaad647300da68f0b26361c11f1e4e15552f11. 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/PT7RR2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e76eebf429ec3b3cc96be7a838fe4f1fc856437ceffde62234aef35c30e82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PTBM12500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b161c0755b70c6a1145f604a27bf4502c3d5e1118d825131fd8fb25d891860d. 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/PTBM12500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8b862c8273f54a513dd3deafe2f559e3af439ce87389801113a3015ac7065. 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/PTBM12500016.